MESON Chess Problem Database
Problem Display
PID: 53195 (3b2b1/3KQ3/2B1p2p/2BN2Rr/Rn1qk1P1/2P2pP1/2P1n1r1/5N2 w - - 0 1)
Wilson, Francis Vaux
2nd Prize, Magyar Sakkelet, 1971
#2
12 + 11
| 268 | Chess Life | 2004 |
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.Sd2#
- 2.Sde3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 1...Qf2
- 2.Sd2#
- 2.Sde3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 1...Qxc3
- 2.Sxc3#
- 2.Sde3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 1...Qe3
- 2.Sdxe3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 1...Qxc5
- 2.Sd2#
- 2.Sf6#
- 1...Qe5
- 2.Sd2#
- 2.Sf6#
- 1...Qf6
- 2.Sd2#
- 2.Sde3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sxf6#
- 2.Sc7#
- 1...Qg7
- 2.Sd2#
- 2.Sde3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 1...Qh8
- 2.Sd2#
- 2.Sde3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 1...Qd2
- 2.Sxd2#
- 1...Qc4
- 2.Sd2#
- 2.Sf6#
- 1...Qxd5+
- 2.Bxd5#
- 1...Bh7
- 2.Qxh7#
- 1...Sa2
- 2.Sd2#
- 1...Sd3
- 2.Sd2#
- 1...Sxd5
- 2.Bxd5#
- 1...Sa6
- 2.Sd2#
- 1...Sxc6
- 2.Sd2#
- 1...Qg1
- Tries
- 1.Bd6?
- threat
- 2.Sf6#
- 1...Qa7+
- 2.Sc7#
- 1...Qxd5
- 2.Bxd5#
- 1...Sxc2
- 2.Sf4#
- 1...Sxd5
- 2.Bxd5#
- 1...Qf6
- 2.Sd2#
- 2.Sde3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sxf6#
- 2.Sc7#
- 1...Qxc3!
- threat
- 1.Qxe6+?
- 1...Qe5
- 2.Sd2#
- 2.Sde3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 2.Se7#
- 2.Qxe5#
- 1...Bxe6+!
- 1...Qe5
- 1.cxd4?
- threat
- 2.Sd2#
- 2.Sc3#
- 2.Sxb4#
- 2.Sf6#
- 1...Rxg3
- 2.Sd2#
- 1...Rxg5
- 2.Sd2#
- 2.Sc3#
- 2.Sf6#
- 1...Sxd4
- 2.Sc3#
- 2.Sf6#
- 1...Sxc2
- 2.Sb4#
- 2.Sf4#
- 1...Sxd5
- 2.Bxd5#
- 1...Sxc6
- 2.Sd2#
- 2.Sf6#
- 1...Sc1
- 2.Sc3#
- 2.Sxb4#
- 2.Sf6#
- 1...Sg1
- 2.Sc3#
- 2.Sxb4#
- 2.Sf6#
- 1...Sc3
- 2.Sxc3#
- 2.Sf6#
- 1...Sf4
- 2.Sc3#
- 2.Sf6#
- 1...Sa2
- 2.Sd2#
- 2.Sc3#
- 2.Sde3#
- 2.Sb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 1...Sd3
- 2.Sd2#
- 2.Sc3#
- 2.Sde3#
- 2.Sb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 1...Sa6
- 2.Sd2#
- 2.Sc3#
- 2.Sde3#
- 2.Sb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sf6#
- 2.Sc7#
- 1...e5
- 2.Sd2#
- 2.Sc3#
- 2.Sf6#
- 2.Qxe5#
- 1...Sxg3!
- threat
- 1.Bd6?
- Keys
- 1.Qd6!
- threat
- 2.Sf6#
- 1...Qg7+
- 2.Se7#
- 1...Qxd5
- 2.Sd2#
- 1...Sxc2
- 2.Sf4#
- 1...Sxd5
- 2.Qe5#
- 1...Sxc6
- 2.Sd2#
- 1...exd5
- 2.Qg6#
- 1...Qf6
- 2.Sd2#
- 2.Sde3#
- 2.Sxb4#
- 2.Sf4#
- 2.Sb6#
- 2.Sxf6#
- 2.Sc7#
- 2.Se7#
- 1...Bf6
- 2.Sxf6#
- threat
- 1.Qd6!
This is a version of 99445
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 4
- REMOVED MATES = 5
- Sets
- Q(e);N_GUARD,P_SPINS(d)::S(A),XQ(e)
- Q(e);CHECK,OGATE,P_SPINQ(e),P_SPINS(d),XS(H)::B(J),XQ(e)
- B(k);N_GUARD::QAB(L),XB(k)
- S(d);P_SPINQ(e)::S(A)
- S(d);OGATE,P_SPINQ(e),P_SPINS(d),XS(H)::B(J),XS(d)
- S(d);P_SPINQ(e),XB(J)::S(A)
- Tries
- Try
- B(G);N_SPINS(H)
- Threat
- B(J)+S(H),DCHECK
- Vars
- Q(e);CHECK,N_GUARD,P_SPINS(d)::B(J)+S(H)
- Q(e);OGATE,P_PINB(G),P_SPINQ(e),P_SPINS(d),XS(H)::B(J),XQ(e)
- S(d);N_GUARD,P_SPINQ(e),XP(B)::B(J)+S(H)
- S(d);OGATE,P_SPINQ(e),P_SPINS(d),XS(H)::B(J),XS(d)
- Refutation
- Q(e);P_SPINS(d),XP(C)
- Try
- Q(L);CHECK,XP(h)
- Refutation
- B(k);CHECK,XQ(L)
- Try
- P(C);N_SPINS(H),XQ(e)
- Threat
- DUALS(4)
- Vars
- R(b);XP(D)::S(A)
- S(d);OGATE,P_SPINS(d),XS(H)::B(J),XS(d)
- Refutation
- S(a);XP(D)
- Try
- Actual
- Q(L);N_PINP(h),N_SPINS(H)
- Threat
- B(J)+S(H),DCHECK
- Vars
- Q(e);CHECK,N_GUARD,P_SPINS(d)::B(J)+S(H)
- Q(e);N_GUARD,P_PINQ(L),P_SPINQ(e),P_SPINS(d),XS(H)::S(A)
- S(d);N_GUARD,P_SPINQ(e),XP(B)::B(J)+S(H)
- S(d);P_SPINQ(e),P_SPINS(d),XS(H)::QAR1(L)
- S(d);P_SPINQ(e),XB(J)::S(A)
- P(h);OGATE,P_SPINP(h),XS(H)::QAB(L)
- B(j);::B(J)+S(H),DCHECK,XB(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).