MESON Chess Problem Database
Problem Display
PID: 269497 (RK2kB2/PpPppp1N/r6b/pP3P2/B5R1/8/7q/6Qb w - - 0 1)
McClelland, David C
British Chess Magazine, 1934
#2
11 + 10
SOLUTION
- SOUND
- Sets
- 1...Qxg1
- 2.c8Q#
- 2.c8R#
- 1...Qxc7+
- 2.Kxc7#
- 1...Qa2
- 2.c8Q#
- 2.c8R#
- 1...Qb2
- 2.c8Q#
- 2.c8R#
- 1...Qd2
- 2.c8Q#
- 2.c8R#
- 1...Qe2
- 2.c8Q#
- 2.c8R#
- 1...Qf2
- 2.c8Q#
- 2.c8R#
- 1...Qg2
- 2.c8Q#
- 2.c8R#
- 1...Qh3
- 2.c8Q#
- 2.c8R#
- 1...Qh4
- 2.c8Q#
- 2.c8R#
- 1...Qh5
- 2.c8Q#
- 2.c8R#
- 1...Rc6
- 2.Kxb7#
- 1...Rd6
- 2.c8Q#
- 2.c8R#
- 1...Rxa7
- 2.Kxa7#
- 1...d5
- 2.b6#
- 1...d6
- 2.c8Q#
- 1...e5
- 2.c8Q#
- 2.c8R#
- 1...Qxg1
- Tries
- 1.Re4?
- threat
- 2.Kxb7#
- 2.Rxe7#
- 1...Qxc7+
- 2.Kxc7#
- 1...Rxa7
- 2.Kxa7#
- 2.Rxe7#
- 1...Bxf8
- 2.Kxb7#
- 1...d5
- 2.Rxe7#
- 2.b6#
- 1...d6
- 2.Rxe7#
- 2.b6#
- 2.c8Q#
- 1...f6
- 2.Rxe7#
- 2.Qg6#
- 1...Qe5
- 2.Kxb7#
- 1...Qd6
- 2.Kxb7#
- 1...Qe2
- 2.Kxb7#
- 2.c8Q#
- 2.c8R#
- 1...Qh4
- 2.Kxb7#
- 2.c8Q#
- 2.c8R#
- 1...Rb6
- 2.Rxe7#
- 1...Re6
- 2.Kxb7#
- 1...Bg5
- 2.Kxb7#
- 1...b6
- 2.Kb7#
- 2.Rxe7#
- 1...e5
- 2.Kxb7#
- 2.c8Q#
- 2.c8R#
- 1...e6
- 2.Kxb7#
- 1...Bxe4!
- threat
- 1.Qxh2?
- threat
- 2.c8Q#
- 2.c8R#
- 1...Rxa7
- 2.Kxa7#
- 2.c8Q#
- 2.c8R#
- 1...Bxf8
- 2.c8Q#
- 2.c8R#
- 1...f6
- 2.Qh5#
- 1...Rb6
- 2.c8Q#
- 2.c8R#
- 1...Rc6
- 2.Kxb7#
- 1...Rd6
- 2.c8Q#
- 2.c8R#
- 1...Re6
- 2.c8Q#
- 2.c8R#
- 1...Rf6
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.c8Q#
- 2.c8R#
- 1...Bg2
- 2.c8Q#
- 2.c8R#
- 1...Bf3
- 2.c8Q#
- 2.c8R#
- 1...Be4
- 2.c8Q#
- 2.c8R#
- 1...Bd5
- 2.c8Q#
- 2.c8R#
- 1...Bc6
- 2.c8Q#
- 2.c8R#
- 1...Bc1
- 2.c8Q#
- 2.c8R#
- 1...Bd2
- 2.c8Q#
- 2.c8R#
- 1...Be3
- 2.c8Q#
- 2.c8R#
- 1...Bg5
- 2.c8Q#
- 2.c8R#
- 1...Bg7
- 2.c8Q#
- 2.c8R#
- 1...b6
- 2.c8Q#
- 2.c8R#
- 1...e5
- 2.c8Q#
- 2.c8R#
- 1...e6
- 2.c8Q#
- 2.c8R#
- 1...Bf4!
- threat
- 1.Re4?
- Keys
- 1.Rg8!
- threat
- 2.Bxh6#
- 2.Bg7#
- 1...Qxc7+
- 2.Kxc7#
- 1...Qxg1
- 2.Bg7#
- 2.c8Q#
- 2.c8R#
- 1...Bxf8
- 2.Rxf8#
- 1...d5
- 2.b6#
- 1...d6
- 2.c8Q#
- 1...f6
- 2.Qg6#
- 1...Qg3
- 2.Bg7#
- 1...Qg2
- 2.Bg7#
- 2.c8Q#
- 2.c8R#
- 1...Rg6
- 2.Bg7#
- 1...Bc1
- 2.Bh6#
- 2.Bg7#
- 1...Bd2
- 2.Bh6#
- 2.Bg7#
- 1...Be3
- 2.Bh6#
- 2.Bg7#
- 1...Bf4
- 2.Bh6#
- 2.Bg7#
- 1...Bg5
- 2.Bh6#
- 2.Bg7#
- 1...Bg7
- 2.Bxg7#
- 1...e5
- 2.c8Q#
- 2.c8R#
- 1...e6
- 2.Sf6#
- threat
- 1.Rg8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 2
- Sets
- Q(b);N_PINP(G),XQ(A)::P=Q
- Q(b);CHECK,XP(G)::R(I)+K(J),XQ(b)
- Q(b);N_PINP(G)::P=Q
- R(d);::R(I)+K(J),XP(f)
- R(d);N_PINP(G)::P=Q
- R(d);XP(F)::R(I)+K(J),XR(d)
- P(g);::B(B)+P(D)
- P(g);N_PINP(G)::P=Q
- P(h);N_PINP(G)::P=Q
- Tries
- Try
- R(C);P_PINP(h)
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,XP(G)::R(I)+K(J),XQ(b)
- B(e);XB(K)::R(I)+K(J),XP(f)
- Q(b);N_SPINP(h)::R(I)+K(J),XP(f)
- Q(b);::R(I)+K(J),XP(f)
- R(d);::R1(C),XP(h)
- R(d);N_SPINP(h)::R(I)+K(J),XP(f)
- B(e);::R(I)+K(J),XP(f)
- P(h);::R(I)+K(J),XP(f)
- Refutation
- B(a);N_SPINP(h),XR(C)
- Try
- Q(A);N_SPINP(G),XQ(b)
- Threat
- P=Q
- Vars
- B(e);XB(K)::P=Q
- P(i);OGATEB::QAB(A)
- R(d);::P=Q
- R(d);::R(I)+K(J),XP(f)
- B(a);::P=Q
- B(e);::P=Q
- P(f);::P=Q
- P(h);::P=Q
- Refutation
- B(e);P_PINP(G)
- Try
- Actual
- R(C);
- Threat
- DUALS(2)
- Vars
- Q(b);CHECK,XP(G)::R(I)+K(J),XQ(b)
- B(e);OGATE,P_SPINB(e),XB(K)::R1(C),XB(e)
- P(g);::B(B)+P(D)
- P(g);N_PINP(G)::P=Q
- P(i);OGATEB::QAB(A)
- Q(b);::R(C)+B(K)
- R(d);::R(C)+B(K)
- B(e);::R(C)+B(K),XB(e)
- P(h);N_PINP(G)::P=Q
- P(h);N_GUARD,S_CUTR(d)::S(H)
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).