MESON Chess Problem Database
Problem Display
PID: 225967 (8/1Q1K4/1P3P1b/1B1n4/ppRBk1Pp/q1P1rp1N/2b2pn1/3R4 w - - 0 1)
Hartong, Jan
Wilson, Francis Vaux
US Problem Bulletin, 1981
#2
11 + 12
SOLUTION
- SOUND
- Sets
- 1...Qxc3
- 2.Bxc3#
- 1...Bf4
- 2.Sxf2#
- 1...Sf4
- 2.Sxf2#
- 1...bxc3
- 2.Bxc3#
- 1...Qxc3
- Tries
- 1.Kc6?
- threat
- 2.Qh7#
- 1...Se7+
- 2.Qxe7#
- 1...Sxf6
- 2.Bxf6#
- 2.Qe7#
- 1...Sgf4
- 2.Sxf2#
- 1...Sdf4
- 2.Sxf2#
- 1...Sc7
- 2.Kxc7#
- 1...Bg7!
- threat
- 1.Kd6?
- threat
- 2.Bc5#
- 2.Be5#
- 2.Qxd5#
- 2.Qh7#
- 1...Bf4+
- 2.Be5#
- 1...bxc3+
- 2.Bc5#
- 1...b3+
- 2.Bc5#
- 1...Qxc3
- 2.Bxc3#
- 2.Qxd5#
- 2.Qh7#
- 1...Rxc3
- 2.Qxd5#
- 2.Qh7#
- 1...Bxd1
- 2.Qh7#
- 1...f1Q
- 2.Qxd5#
- 2.Qh7#
- 1...f1B
- 2.Qxd5#
- 2.Qh7#
- 1...Qa2
- 2.Qxd5#
- 2.Qh7#
- 1...Qb3
- 2.Qxd5#
- 2.Qh7#
- 1...Re1
- 2.Bxf2#
- 2.Bc5#
- 2.Qxd5#
- 2.Qh7#
- 1...Re2
- 2.Bxf2#
- 2.Bc5#
- 2.Qxd5#
- 2.Qh7#
- 1...Rd3
- 2.Qxd5#
- 2.Qh7#
- 1...Bb3
- 2.Qxd5#
- 2.Qh7#
- 1...Bd3
- 2.Qxd5#
- 2.Qh7#
- 1...Bg7
- 2.Bc5#
- 2.Be5#
- 2.Qxd5#
- 1...Sf4
- 2.Sxf2#
- 2.Bc5#
- 2.Be5#
- 1...Bf8+!
- threat
- 1.Ke6?
- threat
- 2.Bc5#
- 2.Be5#
- 2.Qxd5#
- 2.Qh7#
- 1...Qxc3
- 2.Bxc3#
- 2.Qxd5#
- 2.Qh7#
- 1...Rxc3
- 2.Qxd5#
- 2.Qh7#
- 1...Bxd1
- 2.Qh7#
- 1...f1Q
- 2.Qxd5#
- 2.Qh7#
- 1...f1B
- 2.Qxd5#
- 2.Qh7#
- 1...Qa2
- 2.Qxd5#
- 2.Qh7#
- 1...Qb3
- 2.Qxd5#
- 2.Qh7#
- 1...Re1
- 2.Bxf2#
- 2.Bc5#
- 2.Qxd5#
- 2.Qh7#
- 1...Re2
- 2.Bxf2#
- 2.Bc5#
- 2.Qxd5#
- 2.Qh7#
- 1...Rd3
- 2.Qxd5#
- 2.Qh7#
- 1...Bb3
- 2.Qxd5#
- 2.Qh7#
- 1...Bd3
- 2.Qxd5#
- 2.Qh7#
- 1...Bg7
- 2.Bc5#
- 2.Be5#
- 2.Qxd5#
- 1...Sf4+!
- threat
- 1.Kc8?
- threat
- 2.Qh7#
- 1...Sf4
- 2.Sxf2#
- 1...Bg7!
- threat
- 1.Kd8?
- threat
- 2.Qh7#
- 1...Sf4
- 2.Sxf2#
- 1...Bg7!
- threat
- 1.Ke8?
- threat
- 2.Qh7#
- 1...Sf4
- 2.Sxf2#
- 1...Bg7!
- threat
- 1.Bc6?
- threat
- 2.Bxd5#
- 1...Sf4
- 2.Sxf2#
- 1...Bxd1!
- threat
- 1.Qc6?
- threat
- 2.Qe6#
- 1...Bf4
- 2.Sxf2#
- 1...Sf4
- 2.Sxf2#
- 1...Bxd1!
- threat
- 1.Qc7?
- threat
- 2.Sxf2#
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...Sxb6+
- 2.Bxb6#
- 1...Sxf6+
- 2.Bxf6#
- 1...Qxc3
- 2.Sxf2#
- 2.Bxc3#
- 2.Qe5#
- 1...Rxc3
- 2.Sxf2#
- 2.Qe5#
- 1...Bxd1
- 2.Sxf2#
- 1...Sxc3
- 2.Bxc3#
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...Sdf4
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...Se7
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...f1Q
- 2.Qe5#
- 1...f1S
- 2.Sf2#
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...f1B
- 2.Sf2#
- 2.Qe5#
- 1...f1R
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...Qa2
- 2.Sxf2#
- 2.Qe5#
- 1...Qb3
- 2.Sxf2#
- 2.Qe5#
- 1...Re1
- 2.Sxf2#
- 2.Bxf2#
- 2.Bc5#
- 2.Qe5#
- 1...Re2
- 2.Bxf2#
- 2.Bc5#
- 2.Qe5#
- 1...Rd3
- 2.Sxf2#
- 2.Qe5#
- 1...Bb3
- 2.Sxf2#
- 2.Qe5#
- 1...Bd3
- 2.Sxf2#
- 2.Qe5#
- 1...Bf4
- 2.Sxf2#
- 2.Bc5#
- 2.Be5#
- 1...Sxc7!
- threat
- 1.Qb8?
- threat
- 2.Sxf2#
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...Sxb6+
- 2.Bxb6#
- 1...Sxf6+
- 2.Bxf6#
- 1...Qxc3
- 2.Sxf2#
- 2.Bxc3#
- 2.Qe5#
- 1...Rxc3
- 2.Sxf2#
- 2.Qe5#
- 1...Bxd1
- 2.Sxf2#
- 1...Sxc3
- 2.Bxc3#
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...Sdf4
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...Se7
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...f1Q
- 2.Qe5#
- 1...f1S
- 2.Sf2#
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...f1B
- 2.Sf2#
- 2.Qe5#
- 1...f1R
- 2.Bc5#
- 2.Be5#
- 2.Qe5#
- 1...Qa2
- 2.Sxf2#
- 2.Qe5#
- 1...Qb3
- 2.Sxf2#
- 2.Qe5#
- 1...Re1
- 2.Sxf2#
- 2.Bxf2#
- 2.Bc5#
- 2.Qe5#
- 1...Re2
- 2.Bxf2#
- 2.Bc5#
- 2.Qe5#
- 1...Rd3
- 2.Sxf2#
- 2.Qe5#
- 1...Bb3
- 2.Sxf2#
- 2.Qe5#
- 1...Bd3
- 2.Sxf2#
- 2.Qe5#
- 1...Bf4
- 2.Sxf2#
- 2.Bc5#
- 2.Be5#
- 1...Sc7!
- threat
- 1.Kc6?
- Keys
- 1.Rc6!
- threat
- 2.Re6#
- 1...Sxb6+
- 2.Rxb6#
- 1...Sxf6+
- 2.Rxf6#
- 1...Bf4
- 2.Sxf2#
- 1...Sgf4
- 2.Sxf2#
- threat
- 1.Rc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- Q(d);OGATE,XP(B)::R(D)+B(E),XQ(d)
- B(l);SBLOCK::S(C),XP(b)
- S(c);SBLOCK::S(C),XP(b)
- P(h);OGATE,XP(B)::R(D)+B(E),XP(h)
- Tries
- Try
- K(K);N_PINS(k),S_FLIGHT
- Threat
- QAB(J)
- Vars
- S(k);CHECK,N_GUARD::QAR(J),XS(k)
- S(c);SBLOCK::S(C),XP(b)
- S(k);SBLOCK::S(C),XP(b)
- S(k);::QAB(J)+K(K),XS(k)
- Refutation
- B(l);
- Try
- K(K);P-FLIGHT
- Threat
- DUALS(4)
- Vars
- B(l);CHECK::R(D)+B(E)
- P(h);CHECK,XP(B)::R(D)+B(E)
- P(h);CHECK::R(D)+B(E)
- B(a);XR(A)::QAB(J)
- Refutation
- B(l);CHECK
- Try
- K(K);S_FLIGHT
- Threat
- DUALS(4)
- Vars
- B(a);XR(A)::QAB(J)
- Refutation
- S(c);CHECK
- Try
- K(K);S_FLIGHT
- Threat
- QAB(J)
- Vars
- S(c);SBLOCK::S(C),XP(b)
- Refutation
- B(l);
- Try
- K(K);P-FLIGHT
- Threat
- QAB(J)
- Vars
- S(c);SBLOCK::S(C),XP(b)
- Refutation
- B(l);
- Try
- K(K);S_FLIGHT
- Threat
- QAB(J)
- Vars
- S(c);SBLOCK::S(C),XP(b)
- Refutation
- B(l);
- Try
- B(G);
- Threat
- B(G),XS(k)
- Vars
- S(c);SBLOCK::S(C),XP(b)
- Refutation
- B(a);XR(A)
- Try
- Q(J);
- Threat
- QAR2(J)
- Vars
- B(l);SBLOCK::S(C),XP(b)
- S(c);SBLOCK::S(C),XP(b)
- Refutation
- B(a);XR(A)
- Try
- Q(J);N_PINS(k)
- Threat
- DUALS(4)
- Vars
- S(k);CHECK,OGATE,XP(H)::R(D)+B(E),XS(k)
- S(k);CHECK,OGATE,XP(I)::R(D)+B(E),XS(k)
- B(a);XR(A)::S(C),XP(b)
- P(b);::QAR1(J)
- Refutation
- S(k);XQ(J)
- Try
- Q(J);N_PINS(k)
- Threat
- DUALS(4)
- Vars
- S(k);CHECK,OGATE,XP(H)::R(D)+B(E),XS(k)
- S(k);CHECK,OGATE,XP(I)::R(D)+B(E),XS(k)
- B(a);XR(A)::S(C),XP(b)
- P(b);::QAR1(J)
- Refutation
- S(k);
- Try
- Actual
- R(D);N_PINS(k)
- Threat
- R(D)
- Vars
- S(k);CHECK,OGATE,XP(H)::QAB(J)+R(D),XS(k)
- S(k);CHECK,OGATE,XP(I)::QAB(J)+R(D),XS(k)
- B(l);SBLOCK::S(C),XP(b)
- S(c);SBLOCK::S(C),XP(b)
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).