MESON Chess Problem Database
Problem Display
PID: 249913 (3b1B2/1KP1r1P1/R1Nkp1R1/4p3/4b3/1N1P4/5nQ1/7B w - - 0 1)
Larsen, Lars Aksglade (= Aksglade, Lars)
Deutsche Schachzeitung, 1969
#2
11 + 7
| 6490 | yacpdb | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Kd5
- 2.Sb4#
- 1...Kd7
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxd3
- 2.Qd5#
- 1...Bd5
- 2.Qxd5#
- 1...Bf5
- 2.Sb8#
- 2.Qd5#
- 1...Bxc6+
- 2.Qxc6#
- 1...Bxg6
- 2.Sb8#
- 1...Kd5
- Tries
- 1.Kb8?
- threat
- 2.cxd8Q#
- 2.cxd8R#
- 1...Kd5
- 2.Sb4#
- 1...Kd7
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxg2
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxd3
- 2.Qd5#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxc6
- 2.Qd5#
- 2.Qxc6#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxg6
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sxh1
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sxd3
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bf3
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bd5
- 2.Qxd5#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bf5
- 2.Qd5#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sd1
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sh3
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sg4
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxc7+!
- threat
- 1.Kc8?
- threat
- 2.cxd8Q#
- 2.cxd8R#
- 1...Kd5
- 2.Sb4#
- 1...Bxg2
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxd3
- 2.Qd5#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxc6
- 2.Rxc6#
- 2.Qd5#
- 2.Qxc6#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxg6
- 2.Sb4#
- 2.Scd4#
- 2.Sca5#
- 2.Sa7#
- 2.Sxe7#
- 2.Sb8#
- 2.Sxd8#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sxh1
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sxd3
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bf3
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bd5
- 2.Qxd5#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bf5
- 2.Sb4#
- 2.Scd4#
- 2.Sca5#
- 2.Sa7#
- 2.Sxe7#
- 2.Sb8#
- 2.Sxd8#
- 2.Qd5#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sd1
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sh3
- 2.cxd8Q#
- 2.cxd8R#
- 1...Sg4
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxc7!
- threat
- 1.Bxe7+?
- 1...Kd5
- 2.Sb4#
- 2.Ra5#
- 2.cxd8Q#
- 2.cxd8R#
- 1...Kd7
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxe7!
- 1...Kd5
- 1.Qxe4?
- threat
- 2.Sxe5#
- 2.Sb8#
- 2.Qd5#
- 1...Kd7
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxc7
- 2.Qd5#
- 1...Sxh1
- 2.Sxe5#
- 2.Sb8#
- 1...Sxe4!
- threat
- 1.Kb8?
- Keys
- 1.g8Q!
- threat
- 2.Qxe6#
- 1...Bxc6+
- 2.Qxc6#
- 1...Kd5
- 2.Sb4#
- 1...Kd7
- 2.cxd8Q#
- 2.cxd8R#
- 1...Bxg6
- 2.Sb8#
- 1...Bd5
- 2.Qxd5#
- 1...Bf5
- 2.Sb8#
- 2.Qd5#
- threat
- 1.g8Q!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- K(d);N_PINS(F),N_SPINP(e),N_SPINR(f),P-FLIGHT,P_SPINB(b)::S(F)
- K(d);N_PINP(I),N_SPINP(e),N_SPINR(f),P-FLIGHT::PXB(g)=Q
- B(b);N_PINS(F),OGATE,XP(D)::QAR1(B)
- B(b);OGATE::QAR1(B),XB(b)
- B(b);CHECK,OGATE,P_SPINB(b),XS(F)::QAR1(B),XB(b)
- B(b);N_PINS(F),N_SPINP(e),XR(G)::R(E)+S(F)
- Tries
- Try
- K(H);N_SPINP(I),N_SPINS(F),P-FLIGHT
- Threat
- PXB(g)=Q
- Vars
- K(d);N_GUARD,N_SPINP(e),N_SPINR(f),P-FLIGHT,P_SPINB(b)::S(F)
- K(d);N_SPINP(e),N_SPINR(f),P-FLIGHT::PXB(g)=Q
- B(b);XQ(B)::PXB(g)=Q
- B(b);N_SPINP(e),XR(G)::PXB(g)=Q
- S(a);XB(A)::PXB(g)=Q
- S(a);XP(D)::PXB(g)=Q
- B(b);::PXB(g)=Q
- S(a);::PXB(g)=Q
- Refutation
- B(g);CHECK,XP(I)
- Try
- K(H);N_SPINP(I),N_SPINS(F),S_FLIGHT
- Threat
- PXB(g)=Q
- Vars
- K(d);N_SPINP(e),N_SPINR(f),P-FLIGHT,P_SPINB(b)::S(F)
- B(b);XQ(B)::PXB(g)=Q
- S(a);XB(A)::PXB(g)=Q
- S(a);XP(D)::PXB(g)=Q
- B(b);::PXB(g)=Q
- S(a);::PXB(g)=Q
- Refutation
- B(g);XP(I)
- Try
- B(K);CHECK,N_SPINP(I),XR(f)
- Vars
- K(d);N_SPINP(e),P-FLIGHT::PXB(g)=Q
- Refutation
- B(g);XB(K)
- Try
- Q(B);N_SPINS(F),XB(b)
- Threat
- DUALS(3)
- Vars
- K(d);N_PINP(I),N_SPINP(e),N_SPINR(f),P-FLIGHT::PXB(g)=Q
- B(g);XP(I)::QAR1(B)
- Refutation
- S(a);XQ(B)
- Try
- Actual
- P(J);
- Threat
- QAR1(J),XP(e)
- Vars
- B(b);CHECK,OGATE,P_SPINB(b),XS(F)::QAR1(B),XB(b)
- K(d);N_PINS(F),N_SPINR(f),P-FLIGHT,P_SPINB(b)::S(F)
- K(d);N_PINP(I),N_SPINP(e),N_SPINR(f),P-FLIGHT::PXB(g)=Q
- B(b);N_PINS(F),N_SPINP(e),XR(G)::R(E)+S(F)
- B(b);OGATE::QAR1(B),XB(b)
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).