MESON Chess Problem Database
Problem Display
PID: 251769 (8/P1KPRr2/4PPQ1/1ppNpn2/2p1kN1b/nBP5/6P1/2BR4 w - - 0 1)
Doukhan, Gerard
Die Schwalbe, 2021
#2
14 + 9
SOLUTION
- SOUND
- Sets
- 1...Be1
- 2.Rxe1#
- 1...Bg5
- 2.Re1#
- 1...Bxf6
- 2.Re1#
- 1...Sb1
- 2.Bc2#
- 1...Sc2
- 2.Bxc2#
- 1...exf4
- 2.exf7#
- 1...Be1
- Tries
- 1.Se2?
- threat
- 2.Qg4#
- 1...Bg3
- 2.Sxg3#
- 1...Bg5
- 2.Sg3#
- 1...Rg7!
- threat
- 1.Sh3?
- threat
- 2.Qg4#
- 1...Bg3
- 2.Sg5#
- 1...Bg5
- 2.Sf2#
- 2.Sxg5#
- 1...Rg7!
- threat
- 1.Sh5?
- threat
- 2.Qg4#
- 1...Bg3
- 2.Sxg3#
- 1...Bg5
- 2.Sg3#
- 1...Rg7!
- threat
- 1.Se3?
- threat
- 2.Qxf5#
- 1...Kxf4
- 2.Qg4#
- 1...Rxf6!
- threat
- 1.Sb4?
- threat
- 2.a8Q#
- 2.a8B#
- 1...Rxf6
- 2.a8Q#
- 2.a8B#
- 1...Rxe7
- 2.a8Q#
- 2.a8B#
- 1...Bxf6
- 2.Re1#
- 2.a8Q#
- 2.a8B#
- 1...cxb3
- 2.a8Q#
- 2.a8B#
- 1...cxb4
- 2.a8Q#
- 2.a8B#
- 1...exf4
- 2.exf7#
- 1...Rg7
- 2.a8Q#
- 2.a8B#
- 1...Rh7
- 2.a8Q#
- 2.a8B#
- 1...Be1
- 2.Rxe1#
- 2.a8Q#
- 2.a8B#
- 1...Bf2
- 2.a8Q#
- 2.a8B#
- 1...Bg3
- 2.a8Q#
- 2.a8B#
- 1...Bg5
- 2.Re1#
- 2.a8Q#
- 2.a8B#
- 1...Sb1
- 2.Bc2#
- 2.a8Q#
- 2.a8B#
- 1...Sc2
- 2.Bxc2#
- 2.a8Q#
- 2.a8B#
- 1...Rf8!
- threat
- 1.Sb6?
- threat
- 2.a8Q#
- 2.a8B#
- 1...Rxf6
- 2.a8Q#
- 2.a8B#
- 1...Rxe7
- 2.a8Q#
- 2.a8B#
- 1...Bxf6
- 2.Re1#
- 2.a8Q#
- 2.a8B#
- 1...cxb3
- 2.a8Q#
- 2.a8B#
- 1...exf4
- 2.exf7#
- 1...Rg7
- 2.a8Q#
- 2.a8B#
- 1...Rh7
- 2.a8Q#
- 2.a8B#
- 1...Be1
- 2.Rxe1#
- 2.a8Q#
- 2.a8B#
- 1...Bf2
- 2.a8Q#
- 2.a8B#
- 1...Bg3
- 2.a8Q#
- 2.a8B#
- 1...Bg5
- 2.Re1#
- 2.a8Q#
- 2.a8B#
- 1...Sb1
- 2.Bc2#
- 2.a8Q#
- 2.a8B#
- 1...Sc2
- 2.Bxc2#
- 2.a8Q#
- 2.a8B#
- 1...b4
- 2.a8Q#
- 2.a8B#
- 1...Rf8!
- threat
- 1.Bxa3?
- threat
- 2.Bc2#
- 1...exf4
- 2.exf7#
- 1...cxb3!
- threat
- 1.Rd2?
- threat
- 2.Re2#
- 1...exf4
- 2.exf7#
- 1...Sc2
- 2.Bxc2#
- 1...Bf2!
- threat
- 1.Rd4+?
- 1...exd4
- 2.exf7#
- 1...cxd4!
- 1...exd4
- 1.a8Q?
- threat
- 2.Sb4#
- 2.Sb6#
- 1...exf4
- 2.exf7#
- 1...b4
- 2.Sxb4#
- 2.Sb6#
- 1...Rf8!
- threat
- 1.a8B?
- threat
- 2.Sb4#
- 2.Sb6#
- 1...exf4
- 2.exf7#
- 1...b4
- 2.Sxb4#
- 2.Sb6#
- 1...Rf8!
- threat
- 1.Se2?
- Keys
- 1.Sd3!
- threat
- 2.Sxc5#
- 1...Kxd5
- 2.a8Q#
- 2.a8B#
- 1...cxd3
- 2.Qg4#
- 1...Bf2
- 2.Sxf2#
- threat
- 1.Sd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- B(d);N_GUARD::R(B),XB(d)
- B(d);N_GUARD::R(B)
- B(d);N_GUARD,XP(I)::R(B)
- S(a);N_GUARD::B(D)
- S(a);N_GUARD::B(D),XS(a)
- P(g);XS(F)::R(N)+P(H),XR(i)
- Tries
- Try
- S(F);
- Threat
- QAR2(J)
- Vars
- B(d);N_GUARD::S(F),XB(d)
- B(d);N_GUARD::S(F)
- Refutation
- R(i);
- Try
- S(F);
- Threat
- QAR2(J)
- Vars
- B(d);N_GUARD::S(F)
- Refutation
- R(i);
- Try
- S(F);
- Threat
- QAR2(J)
- Vars
- B(d);N_GUARD::S(F),XB(d)
- B(d);N_GUARD::S(F)
- Refutation
- R(i);
- Try
- S(G);
- Threat
- QAB1(J),XS(h)
- Vars
- K(c);N_SPINS(h),OGATEB,P-FLIGHT,XS(F)::QAR1(J)
- Refutation
- R(i);XP(I)
- Try
- S(G);
- Threat
- P=Q
- Vars
- R(i);XP(I)::P=Q
- R(i);P_PINP(M),XR(N)::P=Q
- P(b);XB(D)::P=Q
- P(f);XS(G)::P=Q
- P(g);XS(F)::R(N)+P(H),XR(i)
- R(i);::P=Q
- B(d);::P=Q
- Refutation
- R(i);
- Try
- S(G);
- Threat
- P=Q
- Vars
- R(i);XP(I)::P=Q
- R(i);P_PINP(M),XR(N)::P=Q
- P(b);XB(D)::P=Q
- P(g);XS(F)::R(N)+P(H),XR(i)
- R(i);::P=Q
- B(d);::P=Q
- P(e);::P=Q
- Refutation
- R(i);
- Try
- B(A);XS(a)
- Threat
- B(D)
- Vars
- P(g);XS(F)::R(N)+P(H),XR(i)
- Refutation
- P(b);XB(D)
- Try
- R(B);
- Threat
- R(B)
- Vars
- P(g);XS(F)::R(N)+P(H),XR(i)
- S(a);N_GUARD::B(D),XS(a)
- Refutation
- B(d);
- Try
- R(B);CHECK
- Vars
- P(g);S_CUTP(f),XR(B)::R(N)+P(H),XR(i)
- Refutation
- P(f);XR(B)
- Try
- P(K);
- Threat
- DUALS(2)
- Vars
- P(g);XS(F)::R(N)+P(H),XR(i)
- Refutation
- R(i);
- Try
- P(K);
- Threat
- DUALS(2)
- Vars
- P(g);XS(F)::R(N)+P(H),XR(i)
- Refutation
- R(i);
- Try
- Actual
- S(F);
- Threat
- S(F),XP(f)
- Vars
- K(c);N_SPINS(h),P_SPINP(b),S_FLIGHT,XS(G)::P=Q
- P(b);XS(F)::QAR2(J)
- B(d);N_GUARD::S(F),XB(d)
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).