MESON Chess Problem Database
Problem Display
PID: 87775 (2Br1RnB/1NPPp3/2N1kP1p/qn1p2bR/1p1p4/3Q3K/8/8 w - - 0 1)
Schrader, Megchiel
The Problemist, 2000
#2
11 + 11
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.cxd8S#
- 1...Qa2
- 2.cxd8S#
- 1...Qa3
- 2.cxd8S#
- 1...Qa4
- 2.cxd8S#
- 1...Qa6
- 2.cxd8S#
- 1...Qa7
- 2.cxd8S#
- 1...Qa8
- 2.cxd8S#
- 1...Rxc8
- 2.dxc8Q#
- 2.dxc8B#
- 1...Re8
- 2.dxe8Q#
- 2.dxe8S#
- 2.dxe8B#
- 2.dxe8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Rxf8
- 2.d8S#
- 1...Bc1
- 2.Scxd8#
- 2.Re5#
- 2.Qf5#
- 1...Bd2
- 2.Scxd8#
- 2.Re5#
- 2.Qf5#
- 1...Be3
- 2.Scxd8#
- 2.Re5#
- 2.Qf5#
- 1...Bf4
- 2.Scxd8#
- 2.Qf5#
- 1...Bh4
- 2.Scxd8#
- 2.Re5#
- 2.Qe2#
- 2.Qf5#
- 1...Bxf6
- 2.Scxd8#
- 2.Qf5#
- 1...Sd6
- 2.Sbxd8#
- 1...Qa1
- Tries
- 1.Kg4?
- threat
- 2.Qf5#
- 1...Rxf8
- 2.d8S#
- 1...Sd6
- 2.Sbxd8#
- 1...Sxf6+!
- threat
- 1.Sxd4+?
- 1...Ke5
- 2.Qe3#
- 1...Sxd4!
- 1...Ke5
- 1.Rxg5?
- threat
- 2.Scxd8#
- 2.Re5#
- 2.Qe2#
- 2.Qf5#
- 1...Qxc7
- 2.Qf5#
- 1...Rxd7
- 2.Scd8#
- 2.Re5#
- 2.Qe2#
- 2.Qf5#
- 1...Rxc8
- 2.Qf5#
- 2.dxc8Q#
- 2.dxc8B#
- 1...Rxf8
- 2.d8S#
- 1...Sxf6
- 2.Scxd8#
- 2.Re5#
- 2.Qf5#
- 1...exf6
- 2.Qe2#
- 2.Qf5#
- 1...Qa2
- 2.Scxd8#
- 2.Re5#
- 2.Qf5#
- 2.cxd8S#
- 1...Qa3
- 2.Scxd8#
- 2.Re5#
- 2.cxd8S#
- 1...Re8
- 2.Re5#
- 2.Qe2#
- 2.Qf5#
- 2.dxe8Q#
- 2.dxe8S#
- 2.dxe8B#
- 2.dxe8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 1...Sc3
- 2.Sxd4#
- 2.Scxd8#
- 2.Re5#
- 2.Qf5#
- 1...Sd6
- 2.Sxd4#
- 2.Scxd8#
- 2.Sbxd8#
- 2.Re5#
- 1...hxg5!
- threat
- 1.Qe2+?
- 1...Be3
- 2.Scxd8#
- 2.Re5#
- 2.Qg4#
- 1...Kf5!
- 1...Be3
- 1.f7?
- threat
- 2.Scxd8#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qxc7
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rxd7
- 2.Scd8#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Rxc8
- 2.dxc8Q#
- 2.dxc8B#
- 1...Rxf8
- 2.d8S#
- 1...Sxc7
- 2.Sxd4#
- 2.Scxd8#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qb6
- 2.Scxd8#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qa1
- 2.Scxd8#
- 2.cxd8S#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qa2
- 2.Scxd8#
- 2.cxd8S#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qa3
- 2.Scxd8#
- 2.cxd8S#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qa4
- 2.Scxd8#
- 2.cxd8S#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qa6
- 2.Scxd8#
- 2.cxd8S#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qa7
- 2.Scxd8#
- 2.cxd8S#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Qa8
- 2.Scxd8#
- 2.cxd8S#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Re8
- 2.dxe8Q#
- 2.dxe8S#
- 2.dxe8B#
- 2.dxe8R#
- 2.d8Q#
- 2.d8S#
- 2.d8B#
- 2.d8R#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bc1
- 2.Scxd8#
- 2.Re5#
- 2.Qf5#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bd2
- 2.Scxd8#
- 2.Re5#
- 2.Qf5#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Be3
- 2.Scxd8#
- 2.Re5#
- 2.Qf5#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bf4
- 2.Scxd8#
- 2.Qf5#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bh4
- 2.Scxd8#
- 2.Re5#
- 2.Qe2#
- 2.Qf5#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bf6
- 2.Scxd8#
- 2.Qf5#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sa3
- 2.Sxd4#
- 2.Scxd8#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sc3
- 2.Sxd4#
- 2.Scxd8#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sd6
- 2.Sxd4#
- 2.Scxd8#
- 2.Sbxd8#
- 1...Sa7
- 2.Sxd4#
- 2.Scxd8#
- 2.fxg8Q#
- 2.fxg8B#
- 1...b3
- 2.Scxd8#
- 2.fxg8Q#
- 2.fxg8B#
- 1...Sf6!
- threat
- 1.Kg4?
- Keys
- 1.fxe7!
- threat
- 2.Qf5#
- 1...Rxf8
- 2.d8S#
- 1...Sxe7
- 2.Scxd8#
- 1...Qa3
- 2.cxd8S#
- 1...Sd6
- 2.Sbxd8#
- 1...Sf6
- 2.exd8S#
- threat
- 1.fxe7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- Q(c);N_GUARD::PXR(j)=S
- Q(c);N_GUARD,P_PINQ(A)::PXR(j)=S
- R(j);OGATE,XB(I)::PXR(j)=Q
- R(j);OGATE,XR(J)::P=S
- S(d);SBLOCK::S(F),XR(j)
- Tries
- Try
- K(B);S_FLIGHT
- Threat
- QAB1(A)
- Vars
- R(j);OGATE,XR(J)::P=S
- S(d);SBLOCK::S(F),XR(j)
- Refutation
- S(k);CHECK,XP(E)
- Try
- S(D);CHECK,XP(b)
- Vars
- K(g);P-FLIGHT,P_SPINB(f)::QAR2(A)
- Refutation
- S(d);XS(D)
- Try
- R(C);XB(f)
- Threat
- DUALS(4)
- Vars
- Q(c);XP(G)::QAB1(A)
- R(j);OGATE,XR(J)::P=S
- Refutation
- P(h);XR(C)
- Try
- Q(A);CHECK
- Refutation
- K(g);P_SPINB(f),S_FLIGHT
- Try
- P(E);
- Threat
- DUALS(3)
- Vars
- Q(c);XP(G)::PXS(k)=Q
- R(j);OGATE,XB(I)::PXR(j)=Q
- R(j);OGATE,XR(J)::P=S
- Refutation
- S(k);
- Try
- Actual
- P(E);XP(i)
- Threat
- QAB1(A)
- Vars
- R(j);OGATE,XR(J)::P=S
- S(k);SBLOCK,XP(E)::S(D),XR(j)
- Q(c);N_GUARD,P_PINQ(A)::PXR(j)=S
- S(d);SBLOCK::S(F),XR(j)
- S(k);S_CUTB(f)::PXR(j)=S
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).