MESON Chess Problem Database
Problem Display
PID: 39124 (4Qrb1/4nRP1/pN2n3/3R3B/3Bk3/3pp1Pp/K1PP1P2/2b2r1q w - - 0 1)
Shanshin, Valery Yurevich
The Problemist, 2001
#2
12 + 12
SOLUTION
- SOUND
- Sets
- 1...Qf3
- 2.Bxf3#
- 1...Qg1
- 2.Bf3#
- 1...Qh2
- 2.Bf3#
- 1...Sc5
- 2.Bg6#
- 1...Sg5
- 2.Bg6#
- 1...Sc7
- 2.Bg6#
- 1...Sd8
- 2.Bg6#
- 1...Sf5
- 2.Qxe6#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- 1...Sc8
- 2.Bg6#
- 2.Qxe6#
- 1...Qf3
- Tries
- 1.Ba1?
- threat
- 2.Re5#
- 2.cxd3#
- 1...Sxd5
- 2.Bg6#
- 2.Qxe6#
- 1...dxc2
- 2.d3#
- 1...Bb2
- 2.cxd3#
- 1...Sf4
- 2.Re5#
- 2.Qa4#
- 1...Sc5
- 2.Bg6#
- 2.Re5#
- 1...Sc6
- 2.Bg6#
- 2.cxd3#
- 1...Sg6
- 2.Bxg6#
- 2.cxd3#
- 1...Sd4!
- threat
- 1.Bb2?
- threat
- 2.Re5#
- 2.cxd3#
- 1...Bxb2
- 2.cxd3#
- 1...Sxd5
- 2.Bg6#
- 2.Qxe6#
- 1...dxc2
- 2.d3#
- 1...Sf4
- 2.Re5#
- 2.Qa4#
- 1...Sc5
- 2.Bg6#
- 2.Re5#
- 1...Sc6
- 2.Bg6#
- 2.cxd3#
- 1...Sg6
- 2.Bxg6#
- 2.cxd3#
- 1...Sd4!
- threat
- 1.Bc3?
- threat
- 2.Re5#
- 2.cxd3#
- 1...Sxd5
- 2.Bg6#
- 2.Qxe6#
- 1...dxc2
- 2.d3#
- 1...Sf4
- 2.Re5#
- 2.Qa4#
- 1...Sc5
- 2.Bg6#
- 2.Re5#
- 1...Sc6
- 2.Bg6#
- 2.cxd3#
- 1...Sg6
- 2.Bxg6#
- 2.cxd3#
- 1...Sd4!
- threat
- 1.Bxe3?
- threat
- 2.cxd3#
- 1...Sxd5
- 2.Qxe6#
- 1...dxc2
- 2.d3#
- 1...Sf4
- 2.Qa4#
- 1...Sc5
- 2.Bg6#
- 1...Sd4!
- threat
- 1.Bc5?
- threat
- 2.cxd3#
- 1...Sxc5
- 2.Bg6#
- 1...Sxd5
- 2.Qxe6#
- 1...dxc2
- 2.d3#
- 1...Sf4
- 2.Qa4#
- 1...Sd4!
- threat
- 1.Bf6?
- threat
- 2.cxd3#
- 1...Sxd5
- 2.Qxe6#
- 1...dxc2
- 2.d3#
- 1...Sd4
- 2.Re5#
- 1...Sf4
- 2.Qa4#
- 1...Sc5!
- threat
- 1.Qd7?
- threat
- 2.Re5#
- 2.Qxe6#
- 1...Bxf7
- 2.Re5#
- 1...Sxd4
- 2.Qg4#
- 1...Sxg7
- 2.Re5#
- 2.Qg4#
- 1...Sxd5
- 2.Qxd5#
- 1...Sf4
- 2.Re5#
- 1...Sc5
- 2.Re5#
- 2.Qg4#
- 1...Sg5
- 2.Re5#
- 2.Qg4#
- 1...Sc7
- 2.Re5#
- 2.Qg4#
- 1...Sd8
- 2.Re5#
- 2.Qg4#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- 1...dxc2!
- threat
- 1.Qxe7?
- threat
- 2.Bg6#
- 2.Qxe6#
- 1...Rxf2
- 2.Qxe6#
- 1...Rxf7
- 2.Qxe6#
- 1...dxc2
- 2.Bg6#
- 1...Qf3
- 2.Bxf3#
- 2.Qxe6#
- 1...Re8
- 2.Bg6#
- 2.Rf4#
- 1...Bh7
- 2.Qxe6#
- 1...Bxf7!
- threat
- 1.c3?
- threat
- 2.Re5#
- 1...Sxd5
- 2.Bg6#
- 2.Qxe6#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- 1...Sxd4!
- threat
- 1.Ba1?
- Keys
- 1.Qa4!
- threat
- 2.Re5#
- 1...Sxd4
- 2.Qxd4#
- 1...Sxd5
- 2.Bg6#
- 1...dxc2
- 2.Qxc2#
- 1...Sc6
- 2.Bg6#
- 1...Sg6
- 2.Bxg6#
- threat
- 1.Qa4!
This is a version of 66973
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 8
- Sets
- Q(c);N_GUARD::B(H),XQ(c)
- Q(c);N_GUARD::B(H)
- S(i);P_SPINS(j)::B(H)
- S(j);OGATE,P_SPINS(i)::QAR2(L),XS(i)
- S(j);N_GUARD,P_SPINS(i)::B(H)
- S(j);N_GUARD,P_SPINS(i)::B(H),XS(j)
- Tries
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- P(d);OGATE,XP(B)::P(C)
- B(a);::P(B),XP(d)
- Refutation
- S(i);P_SPINS(j)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- B(a);XB(F)::P(B),XP(d)
- P(d);OGATE,XP(B)::P(C)
- Refutation
- S(i);P_SPINS(j)
- Try
- B(F);
- Threat
- DUALS(2)
- Vars
- P(d);OGATE,XP(B)::P(C)
- Refutation
- S(i);P_SPINS(j)
- Try
- B(F);XP(e)
- Threat
- P(B),XP(d)
- Vars
- S(j);OGATE,P_SPINS(i),XR(G)::QAR2(L),XS(i)
- P(d);OGATE,XP(B)::P(C)
- S(i);N_GUARD,P_SPINS(j)::QAR(L)
- S(i);P_SPINS(j)::B(H)
- Refutation
- S(i);P_SPINS(j)
- Try
- B(F);
- Threat
- P(B),XP(d)
- Vars
- S(i);P_SPINS(j),XB(F)::B(H)
- S(j);OGATE,P_SPINS(i),XR(G)::QAR2(L),XS(i)
- P(d);OGATE,XP(B)::P(C)
- S(i);N_GUARD,P_SPINS(j)::QAR(L)
- Refutation
- S(i);P_SPINS(j)
- Try
- B(F);
- Threat
- P(B),XP(d)
- Vars
- S(j);OGATE,P_SPINS(i),XR(G)::QAR2(L),XS(i)
- P(d);OGATE,XP(B)::P(C)
- S(i);P_SPINS(j),SBLOCK::R1(G)
- S(i);N_GUARD,P_SPINS(j)::QAR(L)
- Refutation
- S(i);P_SPINS(j)
- Try
- Q(L);
- Threat
- DUALS(2)
- Vars
- B(l);XR(J)::R1(G)
- S(i);OGATE,XB(F)::QAR2(L)
- S(j);OGATE,XR(G)::QAB1(L),XS(j)
- S(i);::R1(G)
- S(j);N_GUARD::B(H)
- S(j);N_GUARD::B(H),XS(j)
- Refutation
- P(d);XP(B)
- Try
- Q(L);P_PINS(i),XS(j)
- Threat
- DUALS(2)
- Vars
- R(b);XP(D)::QAR2(L),XS(i)
- R(k);XR(J)::QAR2(L),XS(i)
- P(d);XP(B)::B(H)
- B(l);::QAR2(L),XS(i)
- Refutation
- B(l);XR(J)
- Try
- P(B);
- Threat
- R1(G)
- Vars
- S(j);N_GUARD,P_SPINS(i)::B(H)
- S(j);N_GUARD,P_SPINS(i)::B(H),XS(j)
- Refutation
- S(i);P_SPINS(j),XB(F)
- Try
- Actual
- Q(L);
- Threat
- R1(G)
- Vars
- S(i);OGATE,P_SPINS(i),XB(F)::QAR1(L),XS(i)
- S(j);N_GUARD,XR(G)::B(H)
- P(d);OGATE,XP(B)::QAB(L),XP(d)
- S(j);N_GUARD::B(H)
- S(j);N_GUARD::B(H),XS(j)
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).