MESON Chess Problem Database
Problem Display
PID: 6283 (Bn1R1n2/2pb1p1p/N1r2Q1K/3kB3/8/p2PR3/P2b4/3N4 w - - 0 1)
Larsen, Karl Adolf Koefoed
L'Echiquier, 1928
#2
10 + 10
SOLUTION
- SOUND
- Sets
- 1...Bc1
- 2.Sc3#
- 1...Bc3
- 2.Sxc3#
- 1...Bxe3+
- 2.Sxe3#
- 1...Sxa6
- 2.Qxc6#
- 1...Se6
- 2.Qf3#
- 1...Sg6
- 2.Qxf7#
- 1...Bc1
- Tries
- 1.Bb2?
- 1...Bxe3+
- 2.Sxe3#
- 1...Sxa6
- 2.Qxc6#
- 1...Se6
- 2.Qe5#
- 1...Be1
- 2.Re5#
- 1...Bc1
- 2.Sc3#
- 1...Bc3
- 2.Sxc3#
- 1...Bb4
- 2.Re5#
- 1...Ba5
- 2.Re5#
- 1...Sg6
- 2.Qd4#
- 1...axb2!
- 1...Bxe3+
- 1.Bc3?
- 1...Bxe3+
- 2.Sxe3#
- 1...Bxc3
- 2.Sxc3#
- 1...Sxa6
- 2.Qxc6#
- 1...Se6
- 2.Qe5#
- 1...Be1
- 2.Re5#
- 1...Sg6
- 2.Qd4#
- 1...Bc1!
- 1...Bxe3+
- 1.Bd4?
- threat
- 2.Sxc7#
- 1...Bxe3+
- 2.Sxe3#
- 1...Sxa6
- 2.Bxc6#
- 1...Se6
- 2.Qe5#
- 1...Ba5!
- threat
- 1.Bd6?
- threat
- 2.Sxc7#
- 2.Qe5#
- 1...Bxe3+
- 2.Sxe3#
- 1...Sxa6
- 2.Qe5#
- 1...Se6
- 2.Qe5#
- 1...Bc3
- 2.Sxc3#
- 2.Sxc7#
- 1...Ba5
- 2.Qe5#
- 1...Sg6
- 2.Sxc7#
- 1...cxd6!
- threat
- 1.Bxc7?
- threat
- 2.Qd6#
- 1...Bxe3+
- 2.Sxe3#
- 1...Se6
- 2.Qe5#
- 1...Bb4!
- threat
- 1.Rxd7+?
- 1...Sbxd7
- 2.Bxc6#
- 2.Qxc6#
- 1...Sfxd7!
- 1...Sbxd7
- 1.Rxb8?
- threat
- 2.Rb5#
- 1...Bxe3+
- 2.Sxe3#
- 1...Se6
- 2.Qf3#
- 1...Bb4!
- threat
- 1.Bb2?
- Keys
- 1.Ba1!
- 1...Bxe3+
- 2.Sxe3#
- 1...Sxa6
- 2.Qxc6#
- 1...Se6
- 2.Qe5#
- 1...Be1
- 2.Re5#
- 1...Bc1
- 2.Sc3#
- 1...Bc3
- 2.Sxc3#
- 1...Bb4
- 2.Re5#
- 1...Ba5
- 2.Re5#
- 1...Sg6
- 2.Qd4#
- 1...Bxe3+
- 1.Ba1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- B(a);N_GUARD::S(A)
- B(a);N_GUARD,N_PINR(D)::S(A),XB(a)
- B(a);CHECK,XR(D)::S(A),XB(a)
- S(i);N_GUARD,XS(F)::QAB1(G),XR(d)
- S(j);N_PINQ(G),SBLOCK::QAB(G)
- S(j);N_PINQ(G)::QAB(G),XP(g)
- Tries
- Try
- B(E);
- Vars
- B(a);CHECK,XR(D)::S(A),XB(a)
- S(i);N_GUARD,XS(F)::QAB1(G),XR(d)
- S(j);N_PINQ(G)::QAR1(G)
- B(a);N_PINR(D)::R1(D)
- B(a);N_GUARD::S(A)
- B(a);N_GUARD,N_PINR(D)::S(A),XB(a)
- Refutation
- P(b);XB(E)
- Try
- B(E);
- Vars
- B(a);CHECK,XR(D)::S(A),XB(a)
- B(a);N_PINR(D),XB(E)::S(A),XB(a)
- S(i);N_GUARD,XS(F)::QAB1(G),XR(d)
- S(j);N_PINQ(G)::QAR1(G)
- B(a);N_PINR(D)::R1(D)
- Refutation
- B(a);
- Try
- B(E);
- Threat
- S(F),XP(e)
- Vars
- B(a);CHECK,XR(D)::S(A),XB(a)
- S(i);N_GUARD,XS(F)::B(I),XR(d)
- S(j);N_PINQ(G)::QAR1(G)
- Refutation
- B(a);N_PINR(D)
- Try
- B(E);N_PINB(f),N_SPINQ(G)
- Threat
- DUALS(2)
- Vars
- B(a);CHECK,XR(D)::S(A),XB(a)
- S(i);XS(F)::QAR1(G)
- S(j);::QAR1(G)
- B(a);N_PINR(D)::QAR1(G)
- S(j);::S(F),XP(e)
- Refutation
- P(e);XB(E)
- Try
- B(E);XP(e)
- Threat
- QAR1(G)
- Vars
- B(a);CHECK,XR(D)::S(A),XB(a)
- S(j);N_PINQ(G)::QAR1(G)
- Refutation
- B(a);N_PINR(D)
- Try
- R(J);CHECK,XB(f)
- Refutation
- S(j);XR(J)
- Try
- R(J);N_PINB(f),XS(i)
- Threat
- R(J)
- Vars
- B(a);CHECK,XR(D)::S(A),XB(a)
- S(j);N_PINQ(G),SBLOCK::QAB(G)
- Refutation
- B(a);N_PINR(D)
- Try
- Actual
- B(E);
- Vars
- B(a);CHECK,XR(D)::S(A),XB(a)
- S(i);N_GUARD,XS(F)::QAB1(G),XR(d)
- S(j);N_PINQ(G)::QAR1(G)
- B(a);N_PINR(D)::R1(D)
- B(a);N_GUARD::S(A)
- B(a);N_GUARD,N_PINR(D)::S(A),XB(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).