MESON Chess Problem Database
Problem Display
PID: 154478 (n1R1K3/1Bb2P2/1pN1P3/1p1k2n1/1PN1q3/2B1R3/P6Q/8 w - - 0 1)
McWilliam, Robert C
Comm., The Problemist, 1985
#2
12 + 7
| 15393 | McWilliam Scrapbook | 2015 |
| 3713 | Snap | 2015 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.S6a5#
- 1...Qh1
- 2.S6a5#
- 1...Qc2
- 2.S6a5#
- 1...Qg2
- 2.S6a5#
- 1...Qd3
- 2.S6a5#
- 1...Qf3
- 2.S6a5#
- 1...Qf5
- 2.S6a5#
- 1...Qg6
- 2.S6a5#
- 1...Qh7
- 2.S6a5#
- 1...Qxc4
- 2.Se7#
- 1...Qd4
- 2.S6a5#
- 1...Qf4
- 2.S6a5#
- 1...Qg4
- 2.S6a5#
- 1...Qh4
- 2.S6a5#
- 1...Bxh2
- 2.Sd4#
- 2.Sd8#
- 1...Bg3
- 2.Sd4#
- 2.Sd8#
- 1...Bf4
- 2.Sd4#
- 2.Sd8#
- 1...Be5
- 2.Sd4#
- 2.Sd8#
- 1...Bd6
- 2.Sd4#
- 2.Sd8#
- 1...Bb8
- 2.Sd4#
- 2.Sd8#
- 1...Bd8
- 2.Sd4#
- 2.Sxd8#
- 1...Sxe6
- 2.S6a5#
- 2.S6e5#
- 1...bxc4
- 2.Sd4#
- 2.Sd8#
- 1...Qb1
- Tries
- 1.Se7+?
- 1...Kxe6
- 2.Bd5#
- 2.Qh6#
- 2.f8S#
- 1...Kxc4!
- 1...Kxe6
- 1.Qd6+?
- 1...Bxd6
- 2.Sd4#
- 2.Sd8#
- 1...Kxc4!
- 1...Bxd6
- 1.Qxc7?
- threat
- 2.Sd4#
- 2.Sd8#
- 1...Qxe6+
- 2.Se7#
- 1...Kxc4
- 2.Sa5#
- 2.Se5#
- 1...Kxe6
- 2.Qd7#
- 1...Qxc4
- 2.Se7#
- 2.Re5#
- 2.Rd8#
- 2.Qe5#
- 2.Qd8#
- 2.Qd7#
- 1...Qd4
- 2.Sxd4#
- 2.S6a5#
- 2.Sa7#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 1...Sxc7+!
- threat
- 1.Qd2+?
- 1...Kxe6
- 2.Qd7#
- 1...Qd3
- 2.S6a5#
- 2.Qxd3#
- 1...Qd4
- 2.S6a5#
- 2.Qxd4#
- 1...Kxc4!
- 1...Kxe6
- 1.Se7+?
- Keys
- 1.Qf4!
- 1...Qxe6+
- 2.Se7#
- 1...Kxc4
- 2.Se5#
- 1...Kxe6
- 2.Sd4#
- 1...Qxe3
- 2.Sd8#
- 1...Qxc4
- 2.Se7#
- 1...Qxf4
- 2.S6a5#
- 1...Bxf4
- 2.Sd4#
- 2.Sd8#
- 1...Sxe6
- 2.S6a5#
- 2.S6e5#
- 2.Qxe4#
- 1...Sxf7
- 2.Qxe4#
- 1...bxc4
- 2.Sd4#
- 2.Sd8#
- 1...Qb1
- 2.S6a5#
- 2.Sa7#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Qd4#
- 1...Qh1
- 2.S6a5#
- 2.Sa7#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Qd4#
- 1...Qc2
- 2.S6a5#
- 2.Sa7#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Qd4#
- 1...Qg2
- 2.S6a5#
- 2.Sa7#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Qd4#
- 1...Qd3
- 2.S6a5#
- 2.Sa7#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 1...Qf3
- 2.S6a5#
- 2.Sa7#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Qd4#
- 1...Qf5
- 2.S6a5#
- 2.Sa7#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Qd4#
- 1...Qg6
- 2.S6a5#
- 2.Sa7#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Qd4#
- 1...Qh7
- 2.S6a5#
- 2.Sa7#
- 2.Se7#
- 2.Sb8#
- 2.Sd8#
- 2.Qd4#
- 1...Qd4
- 2.S6a5#
- 2.Qxd4#
- 1...Qe5
- 2.Sd8#
- 1...Be5
- 2.Sd4#
- 2.Sd8#
- 1...Bd6
- 2.Sd4#
- 2.Sd8#
- 1...Bb8
- 2.Sd4#
- 2.Sd8#
- 1...Bd8
- 2.Sd4#
- 2.Sxd8#
- 1...Sf3
- 2.Qxe4#
- 1...Sh3
- 2.Qxe4#
- 1...Sh7
- 2.Qxe4#
- 1...Qxe6+
- 1.Qf4!
Anticipated by 2061(1871)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 9
- REMOVED MATES = 12
- Sets
- Q(a);N_PINP(H)::B(I)+S(G)
- Q(a);N_PINP(H),P_PINP(J)::B(I)+S(G)
- Q(a);N_PINP(H),SBLOCK,XS(F)::B(I)+S(G),DCHECK
- Tries
- Try
- S(G);CHECK,N_SPINP(H)
- Refutation
- K(c);P_SPINB(f),S_FLIGHT,XS(F)
- Try
- Q(B);CHECK
- Refutation
- K(c);S_FLIGHT,XS(F)
- Try
- Q(B);XB(f)
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,XP(H)::B(I)+S(G),DCHECK
- K(c);P_SPINQ(a),S_FLIGHT,XP(H)::QAB1(B)
- Refutation
- S(g);CHECK,XQ(B)
- Try
- Q(B);CHECK
- Vars
- K(c);OGATE,P_SPINQ(a),S_FLIGHT,XP(H)::QAB1(B)
- Refutation
- K(c);S_FLIGHT,XS(F)
- Try
- Actual
- Q(B);
- Vars
- Q(a);CHECK,XP(H)::B(I)+S(G),DCHECK
- K(c);P_SPINQ(a),S_FLIGHT,XS(F)::S(G)
- K(c);P_SPINQ(a),S_FLIGHT,XP(H)::S(G)
- Q(a);XR(D)::B(I)+S(G)
- Q(a);N_PINP(H),XS(F)::B(I)+S(G),DCHECK
- Q(a);N_PINP(H),XQ(B)::B(I)+S(G)
- S(d);N_GUARD,XP(J)::QAB1(B),XQ(a)
- Q(a);::B(I)+S(G)
- S(d);N_GUARD::QAB1(B),XQ(a)
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).