MESON Chess Problem Database
Problem Display
PID: 21973 (8/8/r2R4/r2N2K1/q2k4/pnRpNPB1/1pb5/1nb1Q3 w - - 0 1)
Larsen, Karl Adolf Koefoed
2nd HM., Sydsvenska Dagbladet Snallposten, 1922
#2
8 + 11
SOLUTION
- SOUND
- Sets
- 1...Qd7
- 2.Rc4#
- 1...Qe8
- 2.Rc4#
- 1...Qc4
- 2.Rxc4#
- 1...Rxd5+
- 2.Rxd5#
- 1...Bxe3+
- 2.Qxe3#
- 1...S1d2
- 2.Sf5#
- 1...Sxc3
- 2.Qxc3#
- 1...S3d2
- 2.Sf5#
- 1...Sc5
- 2.Sb6#
- 1...d2
- 2.Sxc2#
- 1...Qd7
- Tries
- 1.Kh4?
- threat
- 2.Sf5#
- 1...Bxe3
- 2.Qxe3#
- 1...Sxc3
- 2.Qxc3#
- 1...Qc4
- 2.Rxc4#
- 1...Qd7
- 2.Rc4#
- 1...d2
- 2.Sxc2#
- 1...Rxd6!
- threat
- 1.Kf5?
- threat
- 2.Be5#
- 1...d2+
- 2.Sxc2#
- 1...Sxc3
- 2.Qxc3#
- 1...Qc4
- 2.Rxc4#
- 1...Qe8
- 2.Rc4#
- 1...Qd7+!
- threat
- 1.Kf6?
- threat
- 2.Sf5#
- 2.Be5#
- 1...Bxe3
- 2.Be5#
- 2.Qxe3#
- 1...Sxc3
- 2.Qxc3#
- 1...Qc4
- 2.Rxc4#
- 1...Qd7
- 2.Be5#
- 2.Rc4#
- 1...Qe8
- 2.Sf5#
- 2.Rc4#
- 1...d2
- 2.Sxc2#
- 2.Be5#
- 1...Rxd6+!
- threat
- 1.Bf4?
- threat
- 2.Sf5#
- 1...Bxe3
- 2.Qxe3#
- 1...Sxc3
- 2.Qxc3#
- 1...Qc4
- 2.Rxc4#
- 1...Qd7
- 2.Rc4#
- 1...d2
- 2.Sxc2#
- 1...Rxd6!
- threat
- 1.Kh4?
- Keys
- 1.Bh2!
- threat
- 2.Qh4#
- 1...Rxd5+
- 2.Rxd5#
- 1...Bxe3+
- 2.Qxe3#
- 1...Sxc3
- 2.Qxc3#
- 1...Qc4
- 2.Rxc4#
- 1...Qd7
- 2.Rc4#
- 1...Qe8
- 2.Rc4#
- 1...S1d2
- 2.Sf5#
- 1...S3d2
- 2.Sf5#
- 1...Sc5
- 2.Sb6#
- 1...d2
- 2.Sxc2#
- threat
- 1.Bh2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(h);N_GUARD::R1(B)
- Q(h);N_GUARD::R1(B),XQ(h)
- R(j);CHECK,OGATE,P_SPINR(j),XS(F)::R1(H),XR(j)
- B(b);CHECK,OGATE,P_PINS(F),XS(C)::QAB1(A),XB(b)
- S(a);N_PINS(C),P_PINS(F)::S(C)
- S(a);OGATE,XR(B)::QAB1(A),XS(a)
- S(f);N_PINS(C),P_PINS(F)::S(C)
- S(f);::R(H)+S(F)
- P(g);N_PINS(C),P_PINS(F)::S(C),XB(d)
- Tries
- Try
- K(G);N_SPINS(C),S_FLIGHT
- Threat
- S(C)
- Vars
- B(b);OGATE,XS(C)::QAB1(A),XB(b)
- S(a);OGATE,XR(B)::QAB1(A),XS(a)
- Q(h);N_GUARD::R1(B),XQ(h)
- Q(h);N_GUARD::R1(B)
- P(g);N_GUARD::S(C),XB(d)
- Refutation
- R(k);XR(H)
- Try
- K(G);N_SPINS(C),P-FLIGHT,P_SPINS(F)
- Threat
- B(E)
- Vars
- P(g);CHECK,N_GUARD::S(C),XB(d)
- S(a);OGATE,XR(B)::QAB1(A),XS(a)
- Q(h);N_GUARD::R1(B),XQ(h)
- Q(h);N_GUARD::R1(B)
- Refutation
- Q(h);CHECK
- Try
- K(G);N_SPINS(C),P_SPINR(H),S_FLIGHT
- Threat
- DUALS(2)
- Vars
- S(a);OGATE,XR(B)::QAB1(A),XS(a)
- Q(h);N_GUARD::R1(B),XQ(h)
- Refutation
- R(k);CHECK,XR(H)
- Try
- B(E);N_SPINS(C),P_SPINS(F)
- Threat
- S(C)
- Vars
- B(b);OGATE,P_PINB(E),XS(C)::QAB1(A),XB(b)
- S(a);OGATE,XR(B)::QAB1(A),XS(a)
- Q(h);N_GUARD::R1(B),XQ(h)
- Q(h);N_GUARD::R1(B)
- P(g);N_GUARD::S(C),XB(d)
- Refutation
- R(k);XR(H)
- Try
- Actual
- B(E);
- Threat
- QAR(A)
- Vars
- R(j);CHECK,OGATE,P_SPINR(j),XS(F)::R1(H),XR(j)
- B(b);CHECK,OGATE,P_PINS(F),XS(C)::QAB1(A),XB(b)
- S(a);OGATE,XR(B)::QAB1(A),XS(a)
- Q(h);N_GUARD::R1(B),XQ(h)
- Q(h);N_GUARD::R1(B)
- S(a);N_PINS(C),P_PINS(F)::S(C)
- S(f);N_PINS(C),P_PINS(F)::S(C)
- S(f);::R(H)+S(F)
- P(g);N_PINS(C),P_PINS(F)::S(C),XB(d)
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).