MESON Chess Problem Database
Problem Display
PID: 148118 (8/3K3p/Np6/1k1B4/3R3r/Q1R4r/1n1PNP1b/5q1b w - - 0 1)
Goumondy, Claude
4th Comm., Probleemblad, 1970-1971
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Rxc3
- 2.Sxc3#
- 1...Rf3
- 2.Bc6#
- 1...Rg3
- 2.Sc7#
- 1...Rxd4
- 2.Sxd4#
- 1...Re4
- 2.Bc6#
- 1...Rf4
- 2.Sc7#
- 1...Rh5
- 2.Rb4#
- 1...Rh6
- 2.Rb4#
- 1...Bf3
- 2.Rb3#
- 1...Be4
- 2.Rb4#
- 1...Bxd5
- 2.Rxd5#
- 1...Bg1
- 2.Sc7#
- 1...Bg3
- 2.Rb3#
- 1...Bf4
- 2.Rb4#
- 1...Bc7
- 2.Sxc7#
- 1...Sd1
- 2.Bc4#
- 2.Qa4#
- 1...Sd3
- 2.Bc4#
- 2.Qa4#
- 1...Sa4
- 2.Qxa4#
- 1...Sc4
- 2.Bxc4#
- 1...Rxc3
- Tries
- 1.Sg3?
- threat
- 2.Sc7#
- 2.Rb3#
- 1...Rxg3
- 2.Sc7#
- 1...Rxd4
- 2.Sc7#
- 1...Bxd5
- 2.Sc7#
- 2.Rxd5#
- 1...Bxg3
- 2.Rb3#
- 1...Sa4
- 2.Qxa4#
- 1...Qd3
- 2.Sc7#
- 1...Qd1
- 2.Sc7#
- 1...Sd3
- 2.Sc7#
- 2.Bc4#
- 2.Qa4#
- 1...Qc4!
- threat
- 1.Sf4?
- threat
- 2.Sc7#
- 2.Rb4#
- 1...Rxc3
- 2.Rb4#
- 1...Rxf4
- 2.Sc7#
- 1...Bxf4
- 2.Rb4#
- 1...Sa4
- 2.Qxa4#
- 1...Sd3
- 2.Sc7#
- 2.Bc4#
- 2.Qa4#
- 1...Sc4
- 2.Sc7#
- 1...Qc4!
- threat
- 1.Sc5?
- threat
- 2.Qb4#
- 2.Qa6#
- 1...Rxc3
- 2.Sxc3#
- 2.Qb4#
- 1...Rxd4
- 2.Sxd4#
- 1...Sa4
- 2.Qb4#
- 2.Qxa4#
- 1...Qa1
- 2.Qb4#
- 1...Sd3
- 2.Bc4#
- 2.Qa4#
- 2.Qa6#
- 1...Sc4
- 2.Bxc4#
- 1...bxc5!
- threat
- 1.Sb8?
- threat
- 2.Qb4#
- 2.Qa6#
- 1...Rxc3
- 2.Sxc3#
- 2.Qb4#
- 1...Rxd4
- 2.Sxd4#
- 1...Sa4
- 2.Qb4#
- 2.Qxa4#
- 1...Qa1
- 2.Qb4#
- 1...Bd6
- 2.Qa6#
- 1...Sd3
- 2.Bc4#
- 2.Qa4#
- 2.Qa6#
- 1...Sc4
- 2.Bxc4#
- 1...Bxb8!
- threat
- 1.Bf3?
- threat
- 2.Rb3#
- 2.Rd5#
- 1...Rxd4+
- 2.Sxd4#
- 1...Qxf2
- 2.Rb3#
- 1...Rxf3
- 2.Rd5#
- 1...Bxf3
- 2.Rb3#
- 1...Sa4
- 2.Qxa4#
- 1...Qd1
- 2.Rd5#
- 1...Rh5
- 2.Rb3#
- 2.Rb4#
- 1...Sd3
- 2.Qa4#
- 1...Bd6!
- threat
- 1.Rf3?
- threat
- 2.Sc3#
- 2.Bc6#
- 1...Qxe2
- 2.Bc6#
- 1...Rxf3
- 2.Bc6#
- 1...Rxd4
- 2.Sc3#
- 2.Sxd4#
- 1...Bxf3
- 2.Sc3#
- 1...Sa4
- 2.Qxa4#
- 1...Rh6
- 2.Sc3#
- 2.Rb4#
- 1...Sd1
- 2.Bc4#
- 2.Bc6#
- 2.Qa4#
- 1...Qc1!
- threat
- 1.Rg3?
- threat
- 2.Sc3#
- 2.Sc7#
- 1...Qxe2
- 2.Sc7#
- 1...Rxg3
- 2.Sc7#
- 1...Bxg3
- 2.Sc3#
- 1...Sa4
- 2.Qxa4#
- 1...Sd1
- 2.Sc7#
- 2.Bc4#
- 2.Qa4#
- 1...Qc1!
- threat
- 1.Rxh3?
- threat
- 2.Sc3#
- 2.Rb3#
- 1...Qxe2
- 2.Rb3#
- 1...Rxh3
- 2.Rb4#
- 1...Rxd4
- 2.Sc3#
- 2.Sxd4#
- 1...Bxd5
- 2.Sc3#
- 1...Sa4
- 2.Qxa4#
- 1...Bd6
- 2.Sc3#
- 1...Qc1
- 2.Rb3#
- 1...Qd1
- 2.Sc3#
- 1...Bf3
- 2.Sc3#
- 1...Bg3
- 2.Sc3#
- 1...Sd1
- 2.Bc4#
- 2.Rb3#
- 2.Qa4#
- 1...Sd3
- 2.Sc3#
- 2.Bc4#
- 2.Qa4#
- 1...Qxh3+!
- threat
- 1.Re4?
- threat
- 2.Sd4#
- 2.Bc6#
- 1...Qxe2
- 2.Bc6#
- 1...Qxf2
- 2.Bc6#
- 1...Rxc3
- 2.Sxc3#
- 2.Sd4#
- 1...Rxe4
- 2.Bc6#
- 1...Bxe4
- 2.Sd4#
- 1...Sa4
- 2.Qxa4#
- 1...Rh6
- 2.Sd4#
- 2.Rb4#
- 1...Be5
- 2.Bc6#
- 1...Rd3!
- threat
- 1.Rxh4?
- threat
- 2.Sd4#
- 2.Rb4#
- 1...Qxe2
- 2.Rb4#
- 1...Qxf2
- 2.Rb4#
- 1...Sa4
- 2.Qxa4#
- 1...Bd6
- 2.Sd4#
- 1...Rd3
- 2.Rb4#
- 1...Be4
- 2.Sd4#
- 1...Bf4
- 2.Sd4#
- 1...Be5
- 2.Rb4#
- 1...Sd3
- 2.Sd4#
- 2.Bc4#
- 2.Qa4#
- 1...Sc4
- 2.Sd4#
- 2.Bxc4#
- 1...Rxh4!
- threat
- 1.f3?
- threat
- 2.Bc6#
- 2.Rb3#
- 1...Rxf3
- 2.Bc6#
- 1...Rxd4
- 2.Sxd4#
- 1...Bxf3
- 2.Rb3#
- 1...Sa4
- 2.Qxa4#
- 1...Bd6
- 2.Bc6#
- 1...Qd1
- 2.Bc6#
- 1...Rh6
- 2.Rb3#
- 2.Rb4#
- 1...Sd3
- 2.Bc4#
- 2.Bc6#
- 2.Qa4#
- 1...Qxf3!
- threat
- 1.f4?
- threat
- 2.Sc7#
- 2.Rb4#
- 1...Rxc3
- 2.Sxc3#
- 2.Rb4#
- 1...Rxf4
- 2.Sc7#
- 1...Bxf4
- 2.Rb4#
- 1...Sa4
- 2.Qxa4#
- 1...Sd3
- 2.Sc7#
- 2.Bc4#
- 2.Qa4#
- 1...Sc4
- 2.Sc7#
- 2.Bxc4#
- 1...Qxf4!
- threat
- 1.Sg3?
- Keys
- 1.Rf4!
- threat
- 2.Sd4#
- 2.Sc7#
- 1...Qxe2
- 2.Sc7#
- 1...Qxf2
- 2.Sc7#
- 1...Rxc3
- 2.Sxc3#
- 2.Sd4#
- 1...Rxf4
- 2.Sc7#
- 1...Bxf4
- 2.Sd4#
- 1...Sa4
- 2.Qxa4#
- 1...Rd3
- 2.Sc7#
- threat
- 1.Rf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 14
- Sets
- R(e);XR(E)::S(B),XR(e)
- R(e);S_CUTB(b)::B(G)
- R(e);S_CUTB(d)::S(H)
- R(f);P_PINB(G),XR(F)::S(B),XR(f)
- R(f);S_CUTB(b)::B(G)
- R(f);S_CUTB(d)::S(H)
- R(f);N_GUARD::R1(F)
- B(b);S_CUTR(e)::R(E)
- B(b);S_CUTR(f)::R1(F)
- B(b);OGATE,XB(G)::R(F),XB(b)
- B(d);N_GUARD::S(H)
- B(d);S_CUTR(e)::R(E)
- B(d);S_CUTR(f)::R1(F)
- B(d);N_GUARD::S(H),XB(d)
- S(c);N_GUARD::QAB1(D),XS(c)
- S(c);N_GUARD::B(G),XS(c)
- Tries
- Try
- S(B);
- Threat
- DUALS(2)
- Vars
- R(e);XS(B)::S(H)
- R(f);P_PINB(G),XR(F)::S(H)
- B(d);XS(B)::R(E)
- S(c);N_GUARD::QAB1(D),XS(c)
- Q(a);::S(H)
- Refutation
- Q(a);
- Try
- S(B);
- Threat
- DUALS(2)
- Vars
- R(e);XR(E)::R1(F)
- R(f);XS(B)::S(H)
- B(d);XS(B)::R1(F)
- S(c);N_GUARD::QAB1(D),XS(c)
- S(c);::S(H)
- Refutation
- Q(a);
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- R(f);P_PINB(G),XR(F)::S(B),XR(f)
- Q(a);::QAR1(D)
- S(c);N_GUARD::B(G),XS(c)
- Refutation
- P(h);XS(H)
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- R(f);P_PINB(G),XR(F)::S(B),XR(f)
- Q(a);::QAR1(D)
- B(d);::QAB1(D)
- S(c);N_GUARD::B(G),XS(c)
- Refutation
- B(d);XS(H)
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- R(f);CHECK,XR(F)::S(B),XR(f)
- Q(a);XP(C)::R(E)
- R(e);XB(G)::R(F)
- B(b);XB(G)::R(E)
- S(c);N_GUARD::QAB1(D),XS(c)
- Q(a);::R(F)
- S(c);N_GUARD::QAB1(D)
- Refutation
- B(d);
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- Q(a);XS(B)::B(G)
- R(e);XR(E)::B(G)
- B(b);XR(E)::S(B)
- S(c);N_GUARD::QAB1(D),XS(c)
- Refutation
- Q(a);
- Try
- R(E);
- Threat
- DUALS(2)
- Vars
- Q(a);XS(B)::S(H)
- R(e);XR(E)::S(H)
- B(d);XR(E)::S(B)
- S(c);N_GUARD::QAB1(D),XS(c)
- Refutation
- Q(a);
- Try
- R(E);XR(e)
- Threat
- DUALS(2)
- Vars
- Q(a);XS(B)::R(E)
- R(f);N_GUARD,XR(E)::R1(F)
- B(b);XB(G)::S(B)
- S(c);N_GUARD::QAB1(D),XS(c)
- B(d);::S(B)
- Q(a);::R(E)
- Q(a);::S(B)
- B(b);::S(B)
- Refutation
- Q(a);CHECK,XR(E)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- Q(a);XS(B)::B(G)
- Q(a);XP(C)::B(G)
- R(f);XR(F)::B(G)
- B(b);XR(F)::S(B)
- S(c);N_GUARD::QAB1(D),XS(c)
- B(d);::B(G)
- Refutation
- R(e);P_PINB(G)
- Try
- R(F);XR(f)
- Threat
- DUALS(2)
- Vars
- Q(a);XS(B)::R1(F)
- Q(a);XP(C)::R1(F)
- S(c);N_GUARD::QAB1(D),XS(c)
- B(d);::S(B)
- R(e);P_PINB(G)::R1(F)
- B(b);::S(B)
- B(d);::R1(F)
- Refutation
- R(e);XR(F)
- Try
- P(C);
- Threat
- DUALS(2)
- Vars
- R(e);XP(C)::B(G)
- R(f);P_PINB(G),XR(F)::S(B),XR(f)
- B(b);XP(C)::R(E)
- S(c);N_GUARD::QAB1(D),XS(c)
- B(d);::B(G)
- Q(a);::B(G)
- Refutation
- Q(a);XP(C)
- Try
- P(C);
- Threat
- DUALS(2)
- Vars
- R(f);XP(C)::S(H)
- B(d);XP(C)::R1(F)
- S(c);N_GUARD::QAB1(D),XS(c)
- Refutation
- Q(a);XP(C)
- Try
- Actual
- R(F);
- Threat
- DUALS(2)
- Vars
- Q(a);XS(B)::S(H)
- Q(a);XP(C)::S(H)
- R(f);XR(F)::S(H)
- B(d);XR(F)::S(B)
- S(c);N_GUARD::QAB1(D),XS(c)
- R(e);P_PINB(G)::S(H)
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).