MESON Chess Problem Database
Problem Display
PID: 183521 (8/1K2P3/1b1R1pp1/4PPrb/4k3/1Q4pB/4P1N1/B1nr3N w - - 0 1)
Rotenberg, Jacques
The Problemist, 2017
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Re1
- 2.Qd5#
- 1...Rf1
- 2.Qd5#
- 1...Rg1
- 2.Qd5#
- 1...Rxh1
- 2.Qd5#
- 1...Rd4
- 2.Qe3#
- 1...Rd5
- 2.Qxd5#
- 1...Rg4
- 2.Qf3#
- 1...Rxf5
- 2.Sxg3#
- 1...Bf3
- 2.Qxf3#
- 2.exf3#
- 1...Bg4
- 2.Sxg3#
- 1...Be3
- 2.Qxe3#
- 1...Bd4
- 2.Qd5#
- 1...Ba5
- 2.Qe3#
- 1...Bc7
- 2.Qe3#
- 1...Bd8
- 2.Qe3#
- 1...Sd3
- 2.Qd5#
- 1...Re1
- Tries
- 1.Bd4?
- threat
- 2.Qd5#
- 2.Qe3#
- 1...Rxd4
- 2.Qe3#
- 1...Bxe2
- 2.Qe3#
- 1...Bxd4
- 2.Qd5#
- 1...Sxe2
- 2.Qe3#
- 1...Rg4
- 2.Qf3#
- 1...Bg4
- 2.Sxg3#
- 1...Rd3
- 2.Qd5#
- 1...Sd3
- 2.Qd5#
- 1...Sxb3!
- threat
- 1.Bg4?
- threat
- 2.Sxg3#
- 2.Qf3#
- 1...Rxh1
- 2.Qd5#
- 2.Qf3#
- 1...Rxg4
- 2.Qf3#
- 1...Rxf5
- 2.Sxg3#
- 1...Bxg4
- 2.Sxg3#
- 1...Sxe2
- 2.Qf3#
- 1...Sxb3
- 2.Sxg3#
- 1...Rd4
- 2.Qe3#
- 1...Bd4
- 2.Qd5#
- 1...Rf1
- 2.Sxg3#
- 2.Qd5#
- 1...Bf2
- 2.Qf3#
- 1...Be3
- 2.Sxg3#
- 2.Qxe3#
- 1...Sd3
- 2.Sxg3#
- 2.Qd5#
- 1...Rd3!
- threat
- 1.Qxd1?
- threat
- 2.Qd5#
- 1...Bg4
- 2.Sxg3#
- 1...Bd4
- 2.Qxd4#
- 1...Sd3
- 2.Qxd3#
- 2.exd3#
- 1...Rg4!
- threat
- 1.Qc2+?
- 1...Sd3
- 2.Qc6#
- 1...Rd3!
- 1...Sd3
- 1.Qc4+?
- 1...Bd4
- 2.Qd5#
- 1...Rd4!
- 1...Bd4
- 1.exf6?
- threat
- 2.Re6#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Rxh1
- 2.Re6#
- 2.Qd5#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Rxf5
- 2.Sxg3#
- 1...Bxe2
- 2.Re6#
- 2.e8Q#
- 2.e8R#
- 1...Sxe2
- 2.Re6#
- 2.e8Q#
- 2.e8R#
- 1...gxf5
- 2.Re6#
- 2.Qe6#
- 1...Rd4
- 2.Re6#
- 2.Qe6#
- 2.Qe3#
- 2.e8Q#
- 2.e8R#
- 1...Rg4
- 2.Qe6#
- 2.Qf3#
- 1...Bg4
- 2.Sxg3#
- 2.Qe6#
- 1...Bd4
- 2.Qd5#
- 1...Rd3
- 2.Re6#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Re1
- 2.Re6#
- 2.Qd5#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Rf1
- 2.Re6#
- 2.Qd5#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Rg1
- 2.Re6#
- 2.Qd5#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Rd2
- 2.Re6#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Rd5
- 2.Qxd5#
- 1...Bf3
- 2.Re6#
- 2.Qe6#
- 2.Qxf3#
- 2.exf3#
- 2.e8Q#
- 2.e8R#
- 1...Bg1
- 2.Re6#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Bf2
- 2.Re6#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Be3
- 2.Re6#
- 2.Qe6#
- 2.Qxe3#
- 2.e8Q#
- 2.e8R#
- 1...Ba5
- 2.Re6#
- 2.Qe6#
- 2.Qe3#
- 2.e8Q#
- 2.e8R#
- 1...Bc5
- 2.Re6#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Ba7
- 2.Re6#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Bc7
- 2.Qe6#
- 2.Qe3#
- 2.e8Q#
- 2.e8R#
- 1...Bd8
- 2.Re6#
- 2.Qe6#
- 2.Qe3#
- 1...Sa2
- 2.Re6#
- 2.Qe6#
- 2.e8Q#
- 2.e8R#
- 1...Sd3
- 2.Qd5#
- 1...Rxd6!
- threat
- 1.e8Q?
- threat
- 2.exf6#
- 1...Rxd6
- 2.exd6#
- 1...Rxf5
- 2.Sxg3#
- 1...fxe5
- 2.Qxe5#
- 1...Rg4
- 2.Qf3#
- 1...Bg4
- 2.Sxg3#
- 1...Rd5
- 2.Qxd5#
- 1...Bd4
- 2.Qd5#
- 1...Bd8
- 2.Qe3#
- 1...Sd3
- 2.Qd5#
- 2.Qc6#
- 1...gxf5!
- threat
- 1.e8R?
- threat
- 2.exf6#
- 1...Rxd6
- 2.exd6#
- 1...Rxf5
- 2.Sxg3#
- 1...fxe5
- 2.Rxe5#
- 1...Rg4
- 2.Qf3#
- 1...Bg4
- 2.Sxg3#
- 1...Rd5
- 2.Qxd5#
- 1...Bd4
- 2.Qd5#
- 1...Bd8
- 2.Qe3#
- 1...Sd3
- 2.Qd5#
- 1...gxf5!
- threat
- 1.Bd4?
- Keys
- 1.e8S!
- threat
- 2.Sxf6#
- 1...Rxd6
- 2.Sxd6#
- 1...Rxf5
- 2.Sxg3#
- 1...fxe5
- 2.Sf6#
- 1...Rd4
- 2.Qe3#
- 1...Rg4
- 2.Qf3#
- 1...Bg4
- 2.Sxg3#
- 1...Bd4
- 2.Qd5#
- 1...Bd8
- 2.Qe3#
- threat
- 1.e8S!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 9
- Sets
- R(b);N_GUARD::QAB1(E)
- R(b);N_GUARD,XS(B)::QAB1(E)
- R(b);S_CUTB(g)::QAR1(E)
- R(b);N_GUARD::QAB1(E),XR(b)
- R(e);S_CUTB(f)::QAB1(E)
- R(e);N_GUARD,XP(H)::S(B),XP(c)
- B(f);S_CUTR(e)::S(B),XP(c)
- B(g);N_GUARD::QAR1(E),XB(g)
- B(g);S_CUTR(b)::QAB1(E)
- B(g);N_GUARD::QAR1(E)
- S(a);S_CUTR(b)::QAB1(E)
- Tries
- Try
- B(A);
- Threat
- DUALS(2)
- Vars
- R(b);XB(A)::QAR1(E)
- B(f);XP(C)::QAR1(E)
- B(g);XB(A)::QAB1(E)
- S(a);XP(C)::QAR1(E)
- R(e);S_CUTB(f)::QAB1(E)
- B(f);S_CUTR(e)::S(B),XP(c)
- R(b);::QAB1(E)
- S(a);::QAB1(E)
- Refutation
- S(a);XQ(E)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- R(e);XB(F)::QAB1(E)
- R(e);XP(H)::S(B),XP(c)
- B(f);XB(F)::S(B),XP(c)
- S(a);XP(C)::QAB1(E)
- S(a);XQ(E)::S(B),XP(c)
- R(b);S_CUTB(g)::QAR1(E)
- B(g);S_CUTR(b)::QAB1(E)
- B(g);::QAB1(E)
- Refutation
- R(b);
- Try
- Q(E);XR(b)
- Threat
- QAB1(E)
- Vars
- B(f);S_CUTR(e)::S(B),XP(c)
- B(g);N_GUARD::QAR1(E),XB(g)
- Refutation
- R(e);
- Try
- Q(E);CHECK
- Vars
- S(a);P_SPINS(a),S_CUTR(b)::QAB(E)
- Refutation
- R(b);P_SPINR(b)
- Try
- Q(E);CHECK
- Vars
- B(g);P_SPINB(g),S_CUTR(b)::QAB1(E)
- Refutation
- R(b);P_SPINR(b)
- Try
- P(G);XP(h)
- Threat
- DUALS(4)
- Vars
- R(e);N_GUARD,XP(H)::S(B),XP(c)
- B(g);S_CUTR(b)::QAB1(E)
- R(b);N_GUARD::QAB1(E),XR(b)
- S(a);S_CUTR(b)::QAB1(E)
- Refutation
- R(b);XR(I)
- Try
- P(K);
- Threat
- QAR(K)+P(G),XP(h)
- Vars
- R(b);OGATE,XR(I)::QAR(K)+P(G),XR(b)
- R(e);N_GUARD,XP(H)::S(B),XP(c)
- P(h);OGATE,P_SPINP(h),XP(G)::QAR1(K),XP(h)
- R(e);S_CUTB(f)::QAB1(E)
- B(f);S_CUTR(e)::S(B),XP(c)
- R(b);N_GUARD::QAB1(E),XR(b)
- B(g);S_CUTR(b)::QAB1(E)
- B(g);N_GUARD::QAR1(E)
- Refutation
- P(i);XP(H)
- Try
- P(K);
- Threat
- R(K)+P(G),XP(h)
- Vars
- R(b);OGATE,XR(I)::R(K)+P(G),XR(b)
- R(e);N_GUARD,XP(H)::S(B),XP(c)
- P(h);OGATE,P_SPINP(h),XP(G)::R1(K),XP(h)
- R(e);S_CUTB(f)::QAB1(E)
- B(f);S_CUTR(e)::S(B),XP(c)
- R(b);N_GUARD::QAB1(E),XR(b)
- B(g);S_CUTR(b)::QAB1(E)
- B(g);N_GUARD::QAR1(E)
- S(a);S_CUTR(b)::QAB1(E)
- Refutation
- P(i);XP(H)
- Try
- Actual
- P(K);
- Threat
- S(K),XP(h)
- Vars
- R(b);XR(I)::S(K),XR(b)
- R(e);N_GUARD,XP(H)::S(B),XP(c)
- P(h);XP(G)::S(K)
- R(b);S_CUTB(g)::QAR1(E)
- R(e);S_CUTB(f)::QAB1(E)
- B(f);S_CUTR(e)::S(B),XP(c)
- B(g);S_CUTR(b)::QAB1(E)
- B(g);N_GUARD::QAR1(E)
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).