MESON Chess Problem Database
Problem Display
PID: 63440 (4B1K1/1p2pQ2/1n1kN2p/2RbR1pP/5nP1/2PP2B1/8/8 w - - 0 1)
Knibbs, M
Chess, 1945
#2
11 + 8
SOLUTION
- SOUND
- Sets
- 1...Se2
- 2.Rxe2#
- 2.Rexd5#
- 1...Sg2
- 2.Rexd5#
- 1...Sxd3
- 2.Rexd5#
- 1...Sh3
- 2.Rexd5#
- 1...Sxh5
- 2.Rexd5#
- 1...Sxe6
- 2.Rexd5#
- 1...Sg6
- 2.Rexd5#
- 1...Sa4
- 2.Rexd5#
- 1...Sc4
- 2.Rexd5#
- 1...Sd7
- 2.Rexd5#
- 1...Sa8
- 2.Rexd5#
- 1...Sc8
- 2.Rexd5#
- 1...Se2
- Tries
- 1.Sxg5?
- 1...Bxf7+
- 2.Sxf7#
- 1...Kxc5
- 2.Se4#
- 1...Kxe5
- 2.Bxf4#
- 2.Qe6#
- 1...Sxd3
- 2.Rexd5#
- 1...Sxh5
- 2.Rexd5#
- 1...Bh1
- 2.Qxe7#
- 1...Ba2
- 2.Se4#
- 1...Bg2
- 2.Qxe7#
- 1...Bb3
- 2.Se4#
- 1...Bf3
- 2.Qxe7#
- 1...Bc4
- 2.Se4#
- 1...Be4
- 2.Sxe4#
- 2.Qxe7#
- 1...Bc6
- 2.Qxe7#
- 1...Be6
- 2.Se4#
- 1...Se2
- 2.Rexd5#
- 1...Sg2
- 2.Rexd5#
- 1...Sh3
- 2.Rexd5#
- 1...Se6
- 2.Rexd5#
- 1...Sg6
- 2.Rexd5#
- 1...Sa4
- 2.Rexd5#
- 1...Sc4
- 2.Rexd5#
- 1...Sd7
- 2.Rexd5#
- 1...Sa8
- 2.Rexd5#
- 1...Sc8
- 2.Rexd5#
- 1...e6
- 2.Qc7#
- 1...hxg5!
- 1...Bxf7+
- 1.Bxf4?
- threat
- 2.Rexd5#
- 2.Rxg5#
- 1...Bxe6
- 2.Red5#
- 2.Rxg5#
- 2.Qxe6#
- 1...Bh1
- 2.Red5#
- 2.Rxg5#
- 1...Ba2
- 2.Red5#
- 2.Rxg5#
- 1...Bg2
- 2.Red5#
- 2.Rxg5#
- 1...Bb3
- 2.Red5#
- 2.Rxg5#
- 1...Bf3
- 2.Red5#
- 2.Rxg5#
- 1...Bc4
- 2.Red5#
- 2.Rxg5#
- 1...Be4
- 2.Red5#
- 2.Rxg5#
- 1...Bc6
- 2.Red5#
- 2.Rxg5#
- 1...Sc4
- 2.Rcxd5#
- 2.Rexd5#
- 1...Sd7
- 2.Rexd5#
- 1...gxf4!
- threat
- 1.Rxg5?
- threat
- 2.Bxf4#
- 1...Sc4
- 2.Rcxd5#
- 2.Rgxd5#
- 1...Sd7
- 2.Rgxd5#
- 1...hxg5!
- threat
- 1.Sxg5?
- Keys
- 1.Sd8!
- 1...Bxf7+
- 2.Sxf7#
- 1...Kxc5
- 2.Sxb7#
- 1...Kxe5
- 2.Qe6#
- 1...Sxd3
- 2.Rexd5#
- 1...Sxh5
- 2.Rexd5#
- 1...Bh1
- 2.Qxe7#
- 1...Ba2
- 2.Sxb7#
- 1...Bg2
- 2.Qxe7#
- 1...Bb3
- 2.Sxb7#
- 1...Bf3
- 2.Qxe7#
- 1...Bc4
- 2.Sxb7#
- 1...Be4
- 2.Qxe7#
- 1...Bc6
- 2.Qxe7#
- 1...Be6
- 2.Sxb7#
- 1...Se2
- 2.Rexd5#
- 1...Sg2
- 2.Rexd5#
- 1...Sh3
- 2.Rexd5#
- 1...Se6
- 2.Rexd5#
- 1...Sg6
- 2.Rexd5#
- 1...Sa4
- 2.Rexd5#
- 1...Sc4
- 2.Rexd5#
- 1...Sd7
- 2.Rexd5#
- 1...Sa8
- 2.Rexd5#
- 1...Sc8
- 2.Rexd5#
- 1...e6
- 2.Qc7#
- 1...Bxf7+
- 1.Sd8!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 14
- REMOVED MATES = 0
- Sets
- S(a);::B(C)+R(F),DCHECK,XB(b)
- S(a);XP(B)::B(C)+R(F),DCHECK,XB(b)
- S(a);XP(G)::B(C)+R(F),DCHECK,XB(b)
- S(a);XS(H)::B(C)+R(F),DCHECK,XB(b)
- S(d);N_GUARD::R1(F),XB(b)
- Tries
- Try
- S(H);P_SPINQ(I),XP(c)
- Vars
- B(b);CHECK,XQ(I)::S(H),XB(b)
- K(e);P_SPINB(b),S_FLIGHT,XR(E)::S(H)
- S(a);XP(B)::B(C)+R(F),DCHECK,XB(b)
- S(a);XP(G)::B(C)+R(F),DCHECK,XB(b)
- B(b);N_PINQ(I)::QAB1(I),XP(h)
- B(b);N_GUARD::S(H)
- S(a);::B(C)+R(F),DCHECK,XB(b)
- S(a);N_PINQ(I)::B(C)+R(F),DCHECK,XB(b)
- S(d);N_GUARD::R1(F),XB(b)
- P(h);N_PINQ(I)::QAB1(I)
- Refutation
- P(f);XS(H)
- Try
- B(C);XS(a)
- Threat
- DUALS(2)
- Vars
- S(d);::B(C)+R(F),DCHECK,XB(b)
- Refutation
- P(c);XB(C)
- Try
- R(F);P_PINS(a),XP(c)
- Threat
- B(C),XS(a)
- Vars
- S(d);N_GUARD::R1(F),XB(b)
- Refutation
- P(f);XR(F)
- Try
- Actual
- S(H);P_SPINQ(I)
- Vars
- B(b);CHECK,XQ(I)::S(H),XB(b)
- K(e);P_SPINB(b),S_FLIGHT,XR(E)::S(H),XP(g)
- K(e);P_SPINB(b),P_SPINS(a),S_FLIGHT,XR(F)::QAR1(I)
- S(a);XP(B)::B(C)+R(F),DCHECK,XB(b)
- S(a);XP(G)::B(C)+R(F),DCHECK,XB(b)
- B(b);N_PINQ(I)::QAB1(I),XP(h)
- B(b);N_GUARD::S(H),XP(g)
- S(a);::B(C)+R(F),DCHECK,XB(b)
- S(a);N_PINQ(I)::B(C)+R(F),DCHECK,XB(b)
- S(d);N_GUARD::R1(F),XB(b)
- P(h);N_PINQ(I)::QAB1(I)
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).