MESON Chess Problem Database
Problem Display
PID: 148132 (8/1Qp2P2/1p2Bn2/NPk2N2/P2R3r/1R5r/1K1PPPbb/5nq1 w - - 0 1)
Goumondy, Claude
Stella Polaris, 1968
#2
13 + 10
SOLUTION
- SOUND
- Sets
- 1...Rxb3+
- 2.Sxb3#
- 1...Rc3
- 2.Rxc3#
- 1...Rf3
- 2.Qc6#
- 1...Rg3
- 2.f8Q#
- 2.f8B#
- 1...Re4
- 2.Qc6#
- 1...Rf4
- 2.f8Q#
- 2.f8B#
- 1...Rh5
- 2.Rc4#
- 1...Rh6
- 2.Rc4#
- 1...Rh7
- 2.Rc4#
- 1...Rh8
- 2.Rc4#
- 1...Bf3
- 2.Rc3#
- 1...Be4
- 2.Rc4#
- 1...Bc6
- 2.Qxc6#
- 1...Bxb7
- 2.Sxb7#
- 1...Bg3
- 2.Rc3#
- 1...Bf4
- 2.Rc4#
- 1...Sg3
- 2.Rc3#
- 2.f8Q#
- 2.f8B#
- 1...Se4
- 2.Rc4#
- 2.Rd5#
- 2.Qd5#
- 2.Qc6#
- 1...Sg4
- 2.Rc4#
- 1...Sd5
- 2.Qc6#
- 1...bxa5
- 2.Qa7#
- 1...Rxb3+
- Tries
- 1.Bd5?
- threat
- 2.Qc6#
- 1...Rxb3+
- 2.Sxb3#
- 1...c6
- 2.Qxc6#
- 1...Bxd5!
- threat
- 1.Rf3?
- threat
- 2.Sb3#
- 2.Qc6#
- 1...Rxf3
- 2.Qc6#
- 1...Bxf3
- 2.Sb3#
- 1...Sxd2
- 2.Qc6#
- 1...bxa5
- 2.Qc6#
- 2.Qa7#
- 1...c6
- 2.Sb3#
- 2.Qxc6#
- 1...Rxd4!
- threat
- 1.Rg3?
- threat
- 2.Sb3#
- 2.f8Q#
- 2.f8B#
- 1...Qxf2
- 2.Sb3#
- 2.f8Q#
- 2.f8B#
- 1...Rxg3
- 2.f8Q#
- 2.f8B#
- 1...Bxb7
- 2.Sb3#
- 2.Sxb7#
- 2.f8Q#
- 2.f8B#
- 1...Bxg3
- 2.Sb3#
- 1...Sxd2
- 2.f8Q#
- 2.f8B#
- 1...Sxg3
- 2.Sb3#
- 2.f8Q#
- 2.f8B#
- 1...bxa5
- 2.Qa7#
- 2.f8Q#
- 2.f8B#
- 1...Qh1
- 2.Sb3#
- 2.f8Q#
- 2.f8B#
- 1...Re4
- 2.Sb3#
- 2.Qc6#
- 2.Qxc7#
- 2.f8Q#
- 2.f8B#
- 1...Rf4
- 2.Sb3#
- 2.f8Q#
- 2.f8B#
- 1...Rg4
- 2.Sb3#
- 2.f8Q#
- 2.f8B#
- 1...Rh5
- 2.Sb3#
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Rh6
- 2.Sb3#
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Rh7
- 2.Sb3#
- 2.Rc4#
- 1...Rh8
- 2.Sb3#
- 2.Rc4#
- 1...Bh1
- 2.Sb3#
- 2.f8Q#
- 2.f8B#
- 1...Bf3
- 2.Sb3#
- 2.f8Q#
- 2.f8B#
- 1...Be4
- 2.Sb3#
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Bd5
- 2.f8Q#
- 2.f8B#
- 1...Bc6
- 2.Sb3#
- 2.Qxc6#
- 2.f8Q#
- 2.f8B#
- 1...Se3
- 2.Sb3#
- 2.f8Q#
- 2.f8B#
- 1...Se4
- 2.Sb3#
- 2.Rc4#
- 2.Qd5#
- 2.Qc6#
- 2.Qxc7#
- 1...Sg4
- 2.Sb3#
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Sd5
- 2.Sb3#
- 2.Qc6#
- 1...Sh5
- 2.Sb3#
- 2.f8Q#
- 2.f8B#
- 1...Sd7
- 2.Sb3#
- 1...Sh7
- 2.Sb3#
- 1...Se8
- 2.Sb3#
- 1...Sg8
- 2.Sb3#
- 1...c6
- 2.Sb3#
- 2.Qe7#
- 2.f8Q#
- 2.f8B#
- 1...Rxd4!
- threat
- 1.Re4?
- threat
- 2.Qc6#
- 2.d4#
- 1...Rxb3+
- 2.Sxb3#
- 1...Qxf2
- 2.Qc6#
- 1...Rxe4
- 2.Qc6#
- 1...Bxe4
- 2.d4#
- 1...Sxd2
- 2.Qc6#
- 1...Rd3
- 2.Qc6#
- 1...c6
- 2.Qxc6#
- 2.d4#
- 1...Be5+!
- threat
- 1.Rf4?
- threat
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Rxb3+
- 2.Sxb3#
- 1...Qxf2
- 2.f8Q#
- 2.f8B#
- 1...Rxf4
- 2.f8Q#
- 2.f8B#
- 1...Bxb7
- 2.Sxb7#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Bxf4
- 2.d4#
- 1...Sxd2
- 2.f8Q#
- 2.f8B#
- 1...bxa5
- 2.Qa7#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Qh1
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Rc3
- 2.Rxc3#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Re3
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Rf3
- 2.Qc6#
- 2.Qxc7#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Rg3
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Rg4
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Rh5
- 2.Rc4#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Rh6
- 2.Rc4#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Rh7
- 2.Rc4#
- 2.d4#
- 1...Rh8
- 2.Rc4#
- 2.d4#
- 1...Bh1
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Bf3
- 2.Rc3#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Be4
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Bd5
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Bc6
- 2.Qxc6#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Bg3
- 2.Rc3#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Se3
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Sg3
- 2.Rc3#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Se4
- 2.Qd5#
- 2.Qc6#
- 2.Qxc7#
- 2.d4#
- 1...Sg4
- 2.Rc4#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Sd5
- 2.Qc6#
- 2.d4#
- 1...Sh5
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Sd7
- 2.d4#
- 1...Sh7
- 2.d4#
- 1...Se8
- 2.d4#
- 1...Sg8
- 2.d4#
- 1...c6
- 2.Qe7#
- 2.d4#
- 2.f8Q#
- 2.f8B#
- 1...Rd3!
- threat
- 1.Rd5+?
- 1...Sxd5
- 2.Qc6#
- 1...Bxd5!
- 1...Sxd5
- 1.Qxg2?
- threat
- 2.Sb7#
- 2.Qc6#
- 1...Rxb3+
- 2.Sxb3#
- 1...bxa5
- 2.Qc6#
- 1...Qh1
- 2.Sb7#
- 1...Rf3
- 2.Sb7#
- 1...Re4
- 2.Sb7#
- 1...Se4
- 2.Sb7#
- 2.Rc4#
- 2.Rd5#
- 1...Sd5
- 2.Sb7#
- 2.Rxd5#
- 2.Qxd5#
- 1...c6
- 2.Sb7#
- 2.Qxc6#
- 1...Qxg2!
- threat
- 1.Qf3?
- threat
- 2.Sb7#
- 2.Rc3#
- 1...Rxf3
- 2.Sb7#
- 1...Rxd4
- 2.Sb7#
- 1...Bxf3
- 2.Rc3#
- 1...Sxd2
- 2.Sb7#
- 1...Se3
- 2.Sb7#
- 1...Se4
- 2.Sb7#
- 2.Rc4#
- 2.Rd5#
- 1...Sd5
- 2.Sb7#
- 2.Rxd5#
- 1...bxa5!
- threat
- 1.Qe4?
- threat
- 2.Sb7#
- 2.Rc4#
- 1...Rxb3+
- 2.Sxb3#
- 1...Rxe4
- 2.Sb7#
- 1...Bxe4
- 2.Rc4#
- 1...Sxd2
- 2.Sb7#
- 1...Rc3
- 2.Sb7#
- 2.Rxc3#
- 1...Be5
- 2.Sb7#
- 1...Se3
- 2.Sb7#
- 1...bxa5!
- threat
- 1.Qd5+?
- 1...Sxd5
- 2.Sb7#
- 1...Bxd5!
- 1...Sxd5
- 1.Qxc7+?
- 1...Bc6
- 2.Sb7#
- 2.Qxc6#
- 1...Bxc7!
- 1...Bc6
- 1.f3?
- threat
- 2.Rc3#
- 2.Qc6#
- 1...Rxf3
- 2.Qc6#
- 1...Rxd4
- 2.Qc6#
- 1...Bxf3
- 2.Rc3#
- 1...Sxd2
- 2.Qc6#
- 1...Qe3
- 2.Qc6#
- 1...Se3
- 2.Qc6#
- 1...Se4
- 2.Rc4#
- 2.Rd5#
- 2.Qd5#
- 2.Qc6#
- 1...Sd5
- 2.Rxd5#
- 2.Qxd5#
- 2.Qc6#
- 1...c6
- 2.Rc3#
- 2.Qxc6#
- 1...Qxd4+!
- threat
- 1.f4?
- threat
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Rxb3+
- 2.Sxb3#
- 1...Rxf4
- 2.f8Q#
- 2.f8B#
- 1...Bxb7
- 2.Sxb7#
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Bxf4
- 2.Rc4#
- 1...Sxd2
- 2.f8Q#
- 2.f8B#
- 1...bxa5
- 2.Rc4#
- 2.Qa7#
- 2.f8Q#
- 2.f8B#
- 1...Qf2
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Qe3
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Qh1
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Rc3
- 2.Rxc3#
- 2.f8Q#
- 2.f8B#
- 1...Rd3
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Re3
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Rf3
- 2.Rc4#
- 2.Qc6#
- 2.Qxc7#
- 2.f8Q#
- 2.f8B#
- 1...Rg3
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Rg4
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Rh5
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Rh6
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Rh7
- 2.Rc4#
- 1...Rh8
- 2.Rc4#
- 1...Bh1
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Bf3
- 2.Rc3#
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Be4
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Bd5
- 2.f8Q#
- 2.f8B#
- 1...Bc6
- 2.Rc4#
- 2.Qxc6#
- 2.f8Q#
- 2.f8B#
- 1...Bg3
- 2.Rc3#
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Se3
- 2.f8Q#
- 2.f8B#
- 1...Sg3
- 2.Rc3#
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Se4
- 2.Rc4#
- 2.Rd5#
- 2.Qd5#
- 2.Qc6#
- 2.Qxc7#
- 1...Sg4
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Sd5
- 2.Rc4#
- 2.Qc6#
- 1...Sh5
- 2.Rc4#
- 2.f8Q#
- 2.f8B#
- 1...Sd7
- 2.Rc4#
- 1...Sh7
- 2.Rc4#
- 1...Se8
- 2.Rc4#
- 1...Sg8
- 2.Rc4#
- 1...c6
- 2.Rc4#
- 2.Qe7#
- 2.f8Q#
- 2.f8B#
- 1...Qxd4+!
- threat
- 1.Bd5?
- Keys
- 1.e4!
- threat
- 2.Rc4#
- 2.Qc6#
- 1...Rxb3+
- 2.Sxb3#
- 1...Rxe4
- 2.Qc6#
- 1...Bxe4
- 2.Rc4#
- 1...Sxd2
- 2.Qc6#
- 1...Rc3
- 2.Rxc3#
- 2.Qc6#
- 1...Be5
- 2.Qc6#
- 1...Se3
- 2.Qc6#
- 1...c6
- 2.Rc4#
- 2.Qxc6#
- threat
- 1.e4!
This is after
After J. Hannelius.
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 14
- Sets
- R(e);CHECK,XR(E)::S(H),XR(e)
- R(e);N_GUARD::R(E),XR(e)
- R(e);S_CUTB(c)::QAR1(L)
- R(e);S_CUTB(d)::P=Q
- R(f);S_CUTB(c)::QAR1(L)
- R(f);S_CUTB(d)::P=Q
- R(f);N_GUARD::R1(G)
- B(c);S_CUTR(e)::R(E)
- B(c);S_CUTR(f)::R1(G)
- B(c);N_GUARD::QAR1(L),XB(c)
- B(c);XQ(L)::S(H),XB(c)
- B(d);S_CUTR(e)::R(E)
- B(d);S_CUTR(f)::R1(G)
- S(i);S_CUTR(f)::R1(G)
- S(i);S_CUTB(c)::QAR1(L)
- P(h);OGATEB,XS(H)::QAB(L)
- Tries
- Try
- B(K);
- Threat
- QAR1(L)
- Vars
- R(e);CHECK,XR(E)::S(H),XR(e)
- P(j);::QAR1(L),XP(j)
- Refutation
- B(c);XB(K)
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- R(e);XR(E)::QAR1(L)
- B(c);XR(E)::S(H)
- S(a);XP(B)::QAR1(L)
- Refutation
- R(f);XR(G)
- Try
- R(E);
- Threat
- DUALS(3)
- Vars
- R(e);XR(E)::P=Q
- B(d);XR(E)::S(H)
- S(a);XP(B)::P=Q
- B(c);::P=Q
- S(i);::S(H)
- Refutation
- R(f);XR(G)
- Try
- R(G);
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,XR(E)::S(H),XR(e)
- Q(b);XP(D)::QAR1(L)
- R(f);XR(G)::QAR1(L)
- B(c);XR(G)::P(B)
- S(a);XP(B)::QAR1(L)
- R(e);::QAR1(L)
- Refutation
- B(d);CHECK
- Try
- R(G);
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,XR(E)::S(H),XR(e)
- Q(b);XP(D)::P=Q
- R(f);XR(G)::P=Q
- B(d);XR(G)::P(B)
- S(a);XP(B)::P=Q
- S(i);::P(B)
- Refutation
- R(e);
- Try
- R(G);CHECK
- Vars
- S(i);XR(G)::QAR1(L)
- Refutation
- B(c);XR(G)
- Try
- Q(L);XB(c)
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,XR(E)::S(H),XR(e)
- P(h);XS(H)::QAR1(L)
- Q(b);::S(H)
- R(e);::S(H)
- R(f);::S(H)
- Refutation
- Q(b);XQ(L)
- Try
- Q(L);
- Threat
- DUALS(2)
- Vars
- R(e);XQ(L)::S(H)
- R(f);XR(G)::S(H)
- B(c);XQ(L)::R(E)
- S(a);XP(B)::S(H)
- S(a);::S(H)
- Refutation
- P(h);XS(H)
- Try
- Q(L);
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,XR(E)::S(H),XR(e)
- R(f);XQ(L)::S(H)
- B(c);XQ(L)::R1(G)
- S(a);XP(B)::S(H)
- B(d);P_PINR(G)::S(H)
- S(a);::S(H)
- Refutation
- P(h);XS(H)
- Try
- Q(L);CHECK
- Vars
- S(i);XQ(L)::S(H)
- Refutation
- B(c);XQ(L)
- Try
- Q(L);CHECK,XP(j)
- Refutation
- B(d);XQ(L)
- Try
- P(D);
- Threat
- DUALS(2)
- Vars
- R(e);XP(D)::QAR1(L)
- R(f);XR(G)::QAR1(L)
- B(c);XP(D)::R(E)
- S(a);XP(B)::QAR1(L)
- Q(b);::QAR1(L)
- S(a);::QAR1(L)
- Refutation
- Q(b);CHECK,XR(G)
- Try
- P(D);
- Threat
- DUALS(3)
- Vars
- R(e);CHECK,XR(E)::S(H),XR(e)
- R(f);XP(D)::P=Q
- B(d);XP(D)::R1(G)
- S(a);XP(B)::P=Q
- R(f);::R1(G)
- B(c);::P=Q
- S(a);::P=Q
- S(i);::R1(G)
- Refutation
- Q(b);CHECK,XR(G)
- Try
- Actual
- P(C);
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,XR(E)::S(H),XR(e)
- R(f);XP(C)::QAR1(L)
- B(c);XP(C)::R1(G)
- S(a);XP(B)::QAR1(L)
- B(d);P_PINR(G)::QAR1(L)
- S(a);::QAR1(L)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).