MESON Chess Problem Database
Problem Display
PID: 7373 (3Qn1B1/K2N4/p1pkPn2/N1pPR1Pp/b1pp1R2/2q5/1r5B/8 w - - 0 1)
Kopaev, Viacheslav Georgievich
StrateGems, 1999
#2
11 + 12
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Sxc4#
- 1...Qd2
- 2.Sxc4#
- 1...Qa3
- 2.Sxc4#
- 1...Qe3
- 2.Sxc4#
- 1...Qf3
- 2.Sxc4#
- 1...Qg3
- 2.Sxc4#
- 1...Qh3
- 2.Sxc4#
- 1...Ra2
- 2.Sb7#
- 1...Rc2
- 2.Sb7#
- 1...Rd2
- 2.Sb7#
- 1...Re2
- 2.Sb7#
- 1...Rf2
- 2.Sb7#
- 1...Rg2
- 2.Sb7#
- 1...Rxh2
- 2.Sb7#
- 1...Rb7+
- 2.Sxb7#
- 1...Bb3
- 2.Sb7#
- 1...Bb5
- 2.Sb7#
- 1...Sc7
- 2.Qf8#
- 1...Qe1
- Tries
- 1.Sf8+?
- 1...Kxe5
- 2.Sg6#
- 1...Sd7!
- 1...Kxe5
- 1.Rf2?
- threat
- 2.Sxf6#
- 1...Rb7+
- 2.Sxb7#
- 1...Qxa5
- 2.Ref5#
- 1...Sxd5
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sxd7
- 2.Qxd7#
- 1...Sxg8
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...cxd5
- 2.Re3#
- 1...Qg3
- 2.Sxc4#
- 1...Se4
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sg4
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sh7
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Rb8!
- threat
- 1.Rf3?
- threat
- 2.Sxf6#
- 1...Rb7+
- 2.Sxb7#
- 1...Rxh2
- 2.Sb7#
- 1...Sxd5
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sxd7
- 2.Qxd7#
- 1...Sxg8
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...cxd5
- 2.Re2#
- 1...Rb8
- 2.Ref5#
- 1...Se4
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sg4
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sh7
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Qxa5!
- threat
- 1.Rxd4?
- threat
- 2.Sxf6#
- 1...Rb7+
- 2.Sxb7#
- 1...Qxa5
- 2.Re2#
- 1...Rxh2
- 2.Sb7#
- 1...Sxd5
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 2.Rexd5#
- 1...Sxd7
- 2.Qxd7#
- 1...Sxg8
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...cxd5
- 2.Rexd5#
- 1...Qg3
- 2.Sxc4#
- 1...Rb8
- 2.Re3#
- 1...Se4
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sg4
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sh7
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...cxd4!
- threat
- 1.Rxf6?
- threat
- 2.Sb6#
- 2.Sb8#
- 2.Sf8#
- 1...Rb7+
- 2.Sxb7#
- 1...Qxa5
- 2.Sb6#
- 1...Rxh2
- 2.Sb7#
- 1...Sxf6
- 2.Sxf6#
- 1...Qg3
- 2.Sxc4#
- 1...Rb6
- 2.Sxb6#
- 2.Sb8#
- 2.Sf8#
- 1...Rb8
- 2.Sxb8#
- 1...cxd5!
- threat
- 1.Ref5?
- threat
- 2.Sxf6#
- 1...Rb7+
- 2.Sxb7#
- 1...Qxa5
- 2.Rf2#
- 1...Sxd5
- 2.Se5#
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sxd7
- 2.Qxd7#
- 1...Sxg8
- 2.Se5#
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Rb8
- 2.Rf3#
- 1...Se4
- 2.Se5#
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sg4
- 2.Se5#
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sh7
- 2.Se5#
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...cxd5!
- threat
- 1.Sf8+?
- Keys
- 1.Rff5!
- threat
- 2.Sxf6#
- 1...Rb7+
- 2.Sxb7#
- 1...Qxa5
- 2.Re2#
- 1...Sxd5
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 2.Rxd5#
- 1...Sxd7
- 2.Qxd7#
- 1...Sxg8
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...cxd5
- 2.Rxd5#
- 1...Rb8
- 2.Re3#
- 1...Se4
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sg4
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- 1...Sh7
- 2.Sb6#
- 2.Sf6#
- 2.Sb8#
- 2.Sf8#
- threat
- 1.Rff5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 17
- Sets
- Q(b);N_GUARD::S(C),XP(d)
- R(a);N_GUARD::S(C)
- R(a);N_GUARD,XB(A)::S(C)
- R(a);CHECK,N_GUARD::S(C),XR(a)
- B(c);S_CUTR(a)::S(C)
- S(l);OGATE,SBLOCK::QAB(J)
- Tries
- Try
- S(I);CHECK
- Vars
- K(j);S_FLIGHT,XR(E)::S(I)
- Refutation
- S(k);P_SPINS(k)
- Try
- R(B);
- Threat
- QAR(J)+S(I),XS(k)
- Vars
- R(a);CHECK,N_GUARD::S(C),XR(a)
- Q(b);N_GUARD,XS(C)::B(A)+R(E)
- S(k);OGATE,P_SPINS(k),XS(I)::QAR1(J),XS(k)
- P(i);SBLOCK,XP(D)::B(A)+R(E)
- Q(b);N_GUARD::S(C),XP(d)
- Refutation
- R(a);
- Try
- R(B);
- Threat
- QAR(J)+S(I),XS(k)
- Vars
- R(a);CHECK,N_GUARD::S(C),XR(a)
- R(a);N_GUARD,XB(A)::S(C)
- S(k);OGATE,P_SPINS(k),XS(I)::QAR1(J),XS(k)
- P(i);SBLOCK,XP(D)::B(A)+R(E)
- R(a);N_GUARD::B(A)+R(E)
- Refutation
- Q(b);XS(C)
- Try
- R(B);XP(e)
- Threat
- QAR(J)+S(I),XS(k)
- Vars
- R(a);CHECK,N_GUARD::S(C),XR(a)
- Q(b);N_GUARD,XS(C)::B(A)+R(E)
- R(a);N_GUARD,XB(A)::S(C)
- S(k);OGATE,P_SPINS(k),XS(I)::QAR1(J),XS(k)
- P(i);OGATE,P_SPINP(i),XP(D)::B(A)+R(E),DCHECK,XP(i)
- Q(b);N_GUARD::S(C),XP(d)
- R(a);N_GUARD::B(A)+R(E)
- Refutation
- P(f);XR(B)
- Try
- R(B);XS(k)
- Threat
- DUALS(3)
- Vars
- R(a);CHECK,N_GUARD::S(C),XR(a)
- Q(b);XS(C)::QAR(J)+S(I)
- R(a);N_GUARD,XB(A)::S(C)
- S(l);XR(B)::QAR(J)+S(I),XS(l)
- Q(b);N_GUARD::S(C),XP(d)
- R(a);::QAR(J)+S(I),XR(a)
- Refutation
- P(i);XP(D)
- Try
- R(E);
- Threat
- QAR(J)+S(I),XS(k)
- Vars
- R(a);CHECK,N_GUARD::S(C),XR(a)
- Q(b);N_GUARD,XS(C)::B(A)+R(B)
- S(k);OGATE,P_SPINS(k),XS(I)::QAR1(J),XS(k)
- R(a);N_GUARD::B(A)+R(B)
- Refutation
- P(i);XP(D)
- Try
- Actual
- R(B);
- Threat
- QAR(J)+S(I),XS(k)
- Vars
- R(a);CHECK,N_GUARD::S(C),XR(a)
- Q(b);N_GUARD,XS(C)::B(A)+R(E)
- S(k);OGATE,P_SPINS(k),XS(I)::QAR1(J),XS(k)
- P(i);OGATE,XP(D)::B(A)+R(E),DCHECK,XP(i)
- R(a);N_GUARD::B(A)+R(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).