MESON Chess Problem Database
Problem Display
PID: 132640 (3R1RQ1/K1P1k1P1/1p6/8/p7/3r3B/b1r5/5q2 w - - 0 1)
White, Alain Campbell
Tidskrift for Schack, 1909
#2
7 + 7
| 1829 | The Theory of Pawn Promotion | 1912 |
SOLUTION
- SOUND
- Sets
- 1...Qf6
- 2.Rfe8#
- 1...Qxf8
- 2.Qxf8#
- 2.gxf8Q#
- 1...Rb2
- 2.c8S#
- 1...Rcd2
- 2.c8S#
- 1...Re2
- 2.c8S#
- 1...Rf2
- 2.c8S#
- 1...Rg2
- 2.c8S#
- 1...Rh2
- 2.c8S#
- 1...Rc4
- 2.Qe6#
- 1...Ra3
- 2.Rd7#
- 1...Rb3
- 2.Rd7#
- 2.Qe6#
- 1...Rc3
- 2.Rd7#
- 1...Re3
- 2.Rd7#
- 1...Rf3
- 2.Rd7#
- 1...Rg3
- 2.Rd7#
- 1...Rd5
- 2.Qe6#
- 1...Rd6
- 2.Rde8#
- 1...Rd7
- 2.Rxd7#
- 1...Rxd8
- 2.cxd8Q#
- 1...Bb1
- 2.Qe6#
- 1...Bc4
- 2.c8S#
- 1...Bd5
- 2.Rd7#
- 1...Be6
- 2.Qxe6#
- 1...Qf6
- Tries
- 1.Qxa2?
- threat
- 2.Qe6#
- 2.g8S#
- 1...Qxh3
- 2.Rf7#
- 2.Qf7#
- 2.g8S#
- 1...Qxf8
- 2.Qe6#
- 2.gxf8Q#
- 1...Rxa2
- 2.c8S#
- 2.g8S#
- 1...Rxh3
- 2.g8S#
- 1...Rxd8
- 2.Qe6#
- 2.cxd8Q#
- 1...Qf7
- 2.Rxf7#
- 2.Qxf7#
- 1...Rd7
- 2.Rxd7#
- 2.Qe6#
- 1...Qe2
- 2.Rf7#
- 2.Qf7#
- 2.g8S#
- 1...Qg2
- 2.Rf7#
- 2.Qe6#
- 2.Qf7#
- 1...Qe1
- 2.Rf7#
- 2.Qf7#
- 2.g8S#
- 1...Qg1
- 2.Rf7#
- 2.Qe6#
- 2.Qf7#
- 1...Qf5
- 2.g8S#
- 1...Qf6
- 2.Rfe8#
- 2.g8S#
- 1...Re2
- 2.c8S#
- 2.g8S#
- 1...Rg2
- 2.Qe6#
- 2.c8S#
- 1...Rc4
- 2.g8S#
- 1...Rc6
- 2.g8S#
- 1...Rb3
- 2.Rd7#
- 2.g8S#
- 1...Re3
- 2.Rd7#
- 2.g8S#
- 1...Rg3
- 2.Rd7#
- 2.Qe6#
- 1...Rd5
- 2.g8S#
- 1...Rd6
- 2.Rde8#
- 2.g8S#
- 1...Rxc7+!
- threat
- 1.Qd5?
- threat
- 2.Rd7#
- 2.Rde8#
- 2.g8S#
- 1...Qxh3
- 2.Rde8#
- 2.Rf7#
- 2.g8S#
- 1...Qxf8
- 2.gxf8Q#
- 1...Rxd5
- 2.g8S#
- 1...Bxd5
- 2.Rd7#
- 1...Qf7
- 2.Rxf7#
- 1...Qg2
- 2.Rd7#
- 2.Rde8#
- 2.Rf7#
- 1...Qg1
- 2.Rd7#
- 2.Rde8#
- 2.Rf7#
- 1...Qf5
- 2.Rde8#
- 2.g8S#
- 1...Rg2
- 2.Rd7#
- 2.Rde8#
- 2.c8S#
- 1...Rg3
- 2.Rd7#
- 2.Rde8#
- 2.Qd6#
- 2.Qd7#
- 1...Rxc7+!
- threat
- 1.Qxa2?
- Keys
- 1.Qc4!
- threat
- 2.c8S#
- 2.g8S#
- 1...Qxh3
- 2.Rf7#
- 2.g8S#
- 1...Qxf8
- 2.gxf8Q#
- 1...Rxc4
- 2.g8S#
- 1...Rxd8
- 2.cxd8Q#
- 1...Bxc4
- 2.c8S#
- 1...Qf7
- 2.Rxf7#
- 1...Rd7
- 2.Rxd7#
- 1...Qg2
- 2.Rf7#
- 2.c8S#
- 1...Qg1
- 2.Rf7#
- 2.c8S#
- 1...Qf5
- 2.g8S#
- 1...Rg2
- 2.c8S#
- 1...Rg3
- 2.Rd7#
- 2.c8S#
- threat
- 1.Qc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 16
- Sets
- Q(a);SBLOCK::R1(F)
- R(c);N_GUARD::P=S
- R(c);S_CUTB(b)::QAR1(G)
- R(d);N_GUARD::R1(E)
- R(d);S_CUTB(b)::QAR1(G)
- R(d);SBLOCK::R1(E)
- R(d);N_GUARD,P_PINP(C)::R1(E),XR(d)
- R(d);OGATE,XR(E)::PXR(d)=Q
- B(b);N_GUARD::QAR1(G)
- B(b);S_CUTR(c)::P=S
- B(b);S_CUTR(d)::R1(E)
- B(b);N_GUARD::QAR1(G),XB(b)
- Tries
- Try
- Q(G);XB(b)
- Threat
- DUALS(2)
- Vars
- R(d);XB(A)::P=S
- Q(a);::P=S
- R(c);::P=S
- R(d);::P=S
- Refutation
- R(c);CHECK,XP(C)
- Try
- Q(G);
- Threat
- DUALS(3)
- Vars
- Q(a);OGATE,XR(F)::PXQ(a)=Q
- R(d);XQ(G)::P=S
- B(b);XQ(G)::R1(E)
- Q(a);N_GUARD::R1(F),XQ(a)
- Refutation
- R(c);CHECK,XP(C)
- Try
- Actual
- Q(G);
- Threat
- DUALS(2)
- Vars
- Q(a);OGATE,XR(F)::PXQ(a)=Q
- R(c);XQ(G)::P=S
- R(d);OGATE,XR(E)::PXR(d)=Q
- B(b);XQ(G)::P=S
- Q(a);N_GUARD::R1(F),XQ(a)
- R(d);N_GUARD,P_PINP(C)::R1(E),XR(d)
- Q(a);::P=S
- R(c);::P=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).