MESON Chess Problem Database
Problem Display
PID: 163909 (4R3/b1r5/4N3/1p2B1P1/1Qb1kPB1/Kpp1P2n/2PR4/3N4 w - - 0 1)
Shanshin, Valery Yurevich
Best Problems, 2014
#2
12 + 8
SOLUTION
- SOUND
- Sets
- 1...Rc5
- 2.Rd4#
- 1...Bxe3
- 2.Sxc3#
- 1...Bd4
- 2.Rxd4#
- 1...Bb8
- 2.Rd4#
- 1...Sxg5
- 2.Sxg5#
- 1...Rc5
- Tries
- 1.Sc5+?
- 1...Rxc5
- 2.Rd4#
- 1...Bxc5!
- 1...Rxc5
- 1.Sxc7?
- threat
- 2.Bxc3#
- 2.Bd6#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 1...Bxe3
- 2.Sxc3#
- 2.Bd6#
- 1...Sxf4
- 2.Bxf4#
- 1...cxd2
- 2.Ba1#
- 2.Bb2#
- 2.Bc3#
- 2.Bd6#
- 2.Bf6#
- 2.Bg7#
- 2.Bh8#
- 1...Bd4
- 2.Rxd4#
- 1...Bc5
- 2.Bd6#
- 1...Sxg5!
- threat
- 1.Bd6?
- threat
- 2.Sc5#
- 2.Sxc7#
- 1...Sxf4
- 2.Sc5#
- 1...Sxg5
- 2.Sc5#
- 2.Sxg5#
- 1...cxd2
- 2.Sxc7#
- 1...Bd4
- 2.Rxd4#
- 1...Rc5
- 2.Sxc5#
- 2.Rd4#
- 1...Rc6
- 2.Sc5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Rb7
- 2.Sc5#
- 2.Sc7#
- 1...Rd7
- 2.Sc5#
- 1...Rf7
- 2.Sc5#
- 1...Rg7
- 2.Sc5#
- 2.Sxg7#
- 1...Rh7
- 2.Sc5#
- 2.Sg7#
- 1...Rc8
- 2.Sc5#
- 2.Sd8#
- 1...Bc5
- 2.Sxc5#
- 2.Sxc7#
- 1...Re7!
- threat
- 1.Bf6?
- threat
- 2.Sc5#
- 2.Sxc7#
- 1...Bxe3
- 2.Sxc3#
- 1...Sxf4
- 2.Sc5#
- 1...Sxg5
- 2.Sc5#
- 2.Sxg5#
- 1...cxd2
- 2.Sxc7#
- 1...Bd4
- 2.Rxd4#
- 1...Rc5
- 2.Sxc5#
- 2.Rd4#
- 1...Rc6
- 2.Sc5#
- 1...Rb7
- 2.Sc5#
- 2.Sc7#
- 1...Rd7
- 2.Sc5#
- 1...Rf7
- 2.Sc5#
- 1...Rg7
- 2.Sc5#
- 2.Sxg7#
- 1...Rh7
- 2.Sc5#
- 2.Sg7#
- 1...Rc8
- 2.Sc5#
- 2.Sd8#
- 1...Bc5
- 2.Sxc5#
- 1...Re7!
- threat
- 1.Bxc7?
- threat
- 2.Sc5#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Sxf4
- 2.Sxf4#
- 2.Sc5#
- 1...Sxg5
- 2.Sc5#
- 2.Sxg5#
- 1...Bd4
- 2.Rxd4#
- 1...Bc5
- 2.Sxc5#
- 1...cxd2!
- threat
- 1.Bg7?
- threat
- 2.Sc5#
- 2.Sxc7#
- 1...Rxg7
- 2.Sc5#
- 2.Sxg7#
- 1...Bxe3
- 2.Sxc3#
- 1...Sxf4
- 2.Sc5#
- 1...Sxg5
- 2.Sc5#
- 2.Sxg5#
- 1...cxd2
- 2.Sxc7#
- 1...Bd4
- 2.Rxd4#
- 1...Rc5
- 2.Sxc5#
- 2.Rd4#
- 1...Rc6
- 2.Sc5#
- 1...Rb7
- 2.Sc5#
- 2.Sc7#
- 1...Rd7
- 2.Sc5#
- 1...Rf7
- 2.Sc5#
- 1...Rc8
- 2.Sc5#
- 2.Sd8#
- 1...Bc5
- 2.Sxc5#
- 1...Re7!
- threat
- 1.Bh8?
- threat
- 2.Sc5#
- 2.Sxc7#
- 1...Bxe3
- 2.Sxc3#
- 1...Sxf4
- 2.Sc5#
- 1...Sxg5
- 2.Sc5#
- 2.Sxg5#
- 1...cxd2
- 2.Sxc7#
- 1...Bd4
- 2.Rxd4#
- 1...Rc5
- 2.Sxc5#
- 2.Rd4#
- 1...Rc6
- 2.Sc5#
- 1...Rb7
- 2.Sc5#
- 2.Sc7#
- 1...Rd7
- 2.Sc5#
- 1...Rf7
- 2.Sc5#
- 1...Rg7
- 2.Sc5#
- 2.Sxg7#
- 1...Rh7
- 2.Sc5#
- 2.Sg7#
- 1...Rc8
- 2.Sc5#
- 2.Sd8#
- 1...Bc5
- 2.Sxc5#
- 1...Re7!
- threat
- 1.Sc5+?
- Keys
- 1.Bd4!
- threat
- 2.Sxc3#
- 1...Kd5
- 2.Bf3#
- 1...Bxe6
- 2.Bc5#
- 1...Bxd4
- 2.Rxd4#
- 1...cxd2
- 2.Sc3#
- 1...Bf1
- 2.Sxc7#
- 1...Be2
- 2.Sxc7#
- 1...Bd3
- 2.Sxc7#
- 1...Bd5
- 2.Sc5#
- threat
- 1.Bd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 7
- REMOVED MATES = 4
- Sets
- R(h);S_CUTB(g)::R1(C)
- B(g);SBLOCK,XP(E)::S(A),XP(b)
- B(g);N_GUARD,N_SPINB(d)::R1(C),XB(g)
- B(g);N_GUARD::R1(C)
- S(c);XP(J)::S(K),XS(c)
- Tries
- Try
- S(K);CHECK
- Vars
- R(h);XS(K)::R1(C)
- Refutation
- B(g);P_PINQ(F),XS(K)
- Try
- S(K);XR(h)
- Threat
- DUALS(5)
- Vars
- S(c);OGATE,XP(G)::R(L)+B(I),XS(c)
- B(g);N_GUARD,N_SPINB(d)::R1(C),XB(g)
- B(g);P_PINQ(F)::R(L)+B(I)
- Refutation
- S(c);XP(J)
- Try
- B(I);
- Threat
- DUALS(2)
- Vars
- S(c);XP(G)::R(L)+S(K),DCHECK
- P(b);XR(C)::R(L)+S(K),XR(h)
- B(g);N_GUARD,N_SPINB(d)::R1(C),XB(g)
- R(h);::R(L)+S(K),DCHECK
- Refutation
- R(h);
- Try
- B(I);
- Threat
- DUALS(2)
- Vars
- B(g);SBLOCK,XP(E)::S(A),XP(b)
- S(c);XP(G)::R(L)+S(K),DCHECK
- P(b);XR(C)::R(L)+S(K),XR(h)
- B(g);N_GUARD,N_SPINB(d)::R1(C),XB(g)
- R(h);::R(L)+S(K),DCHECK
- B(g);P_PINQ(F)::R(L)+S(K),DCHECK,XB(g)
- Refutation
- R(h);
- Try
- B(I);XR(h)
- Threat
- DUALS(4)
- Vars
- B(g);N_GUARD,N_SPINB(d)::R1(C),XB(g)
- B(g);P_PINQ(F)::R(L)+S(K),DCHECK,XB(g)
- Refutation
- P(b);XR(C)
- Try
- B(I);
- Threat
- DUALS(2)
- Vars
- B(g);SBLOCK,XP(E)::S(A),XP(b)
- S(c);XP(G)::R(L)+S(K),DCHECK
- P(b);XR(C)::R(L)+S(K),XR(h)
- B(g);N_GUARD,N_SPINB(d)::R1(C),XB(g)
- R(h);::R(L)+S(K),DCHECK
- B(g);P_PINQ(F)::R(L)+S(K),DCHECK,XB(g)
- Refutation
- R(h);
- Try
- B(I);
- Threat
- DUALS(2)
- Vars
- B(g);SBLOCK,XP(E)::S(A),XP(b)
- S(c);XP(G)::R(L)+S(K),DCHECK
- P(b);XR(C)::R(L)+S(K),XR(h)
- B(g);N_GUARD,N_SPINB(d)::R1(C),XB(g)
- R(h);::R(L)+S(K),DCHECK
- B(g);P_PINQ(F)::R(L)+S(K),DCHECK,XB(g)
- Refutation
- R(h);
- Try
- Actual
- B(I);N_PINB(d)
- Threat
- S(A),XP(b)
- Vars
- K(e);S_FLIGHT::B(H)
- B(d);OGATEB,P_SPINB(d),XS(K)::QAR(F)+B(I)
- B(g);OGATE,XB(I)::R1(C),XB(g)
- P(b);XR(C)::S(A)
- B(d);N_GUARD::R(L)+S(K),XR(h)
- B(d);SBLOCK::R(L)+S(K),DCHECK
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).