MESON Chess Problem Database
Problem Display
PID: 139125 (b5K1/BP1PP3/pR6/r1kNQ1p1/1Nq5/4pn2/1PB1pn2/2R5 w - - 0 1)
Larsen, Lars Aksglade (= Aksglade, Lars)
2nd HM., BCF 122. Ty., 1969-1970
#2
12 + 10
SOLUTION
- SOUND
- Sets
- 1...Qa2
- 2.Bb3#
- 1...Qb3
- 2.Bxb3#
- 1...Qd3
- 2.Bxd3#
- 1...Qb5
- 2.Rc6#
- 1...Qxd5+
- 2.Qxd5#
- 1...Qxc2
- 2.Rxc2#
- 1...Qc3
- 2.Qxc3#
- 1...Qd4
- 2.Qc7#
- 1...Qe4
- 2.Bxe4#
- 1...Qf4
- 2.Be4#
- 1...Qg4
- 2.Be4#
- 1...Qh4
- 2.Be4#
- 1...Rb5
- 2.Sxa6#
- 2.Rc6#
- 1...Bxb7
- 2.Rxb7#
- 1...Sd4
- 2.Qd6#
- 1...Qa2
- Tries
- 1.Sd3+?
- 1...Qxd3
- 2.Bxd3#
- 1...Sxd3!
- 1...Qxd3
- 1.Bd3?
- threat
- 2.Rxc4#
- 1...Qxc1
- 2.Rb5#
- 2.Rxa6#
- 2.Rc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 1...Sxd3
- 2.Sxd3#
- 1...Qc2
- 2.Rxc2#
- 2.Rb5#
- 2.Rxa6#
- 2.Rc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 1...Qc3
- 2.Rxc3#
- 2.Rb5#
- 2.Rxa6#
- 2.Rc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 2.Qxc3#
- 1...Sd2
- 2.Qxe3#
- 1...Sxe5!
- threat
- 1.Ba4?
- threat
- 2.Rb5#
- 2.Rxa6#
- 2.Rc6#
- 2.Rd6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 1...Qxc1
- 2.Rc6#
- 1...Sxe5
- 2.Rxa6#
- 2.Rc6#
- 2.Re6#
- 2.Rf6#
- 2.Rg6#
- 2.Rh6#
- 1...Qc2
- 2.Rxc2#
- 2.Rc6#
- 1...Qc3
- 2.Rxc3#
- 2.Rc6#
- 2.Qxc3#
- 1...Rb5
- 2.Sxa6#
- 2.Rxb5#
- 2.Rc6#
- 1...Rxa4!
- threat
- 1.Qxe3+?
- 1...Qd4
- 2.Bb1#
- 2.Bd1#
- 2.Bb3#
- 2.Bd3#
- 2.Ba4#
- 2.Be4#
- 2.Bf5#
- 2.Bg6#
- 2.Bh7#
- 1...Sd4!
- 1...Qd4
- 1.bxa8Q?
- threat
- 2.Rb7#
- 2.Rb8#
- 2.Qc6#
- 2.Qc8#
- 1...Qxd5+
- 2.Qaxd5#
- 2.Qexd5#
- 1...Qxc2
- 2.Rxc2#
- 2.Qc6#
- 2.Qc8#
- 1...Qxb4
- 2.Rxb4#
- 2.Qc6#
- 2.Qc8#
- 1...Qa2
- 2.Bb3#
- 2.Qc6#
- 2.Qc8#
- 1...Qb3
- 2.Bxb3#
- 2.Qc6#
- 2.Qc8#
- 1...Qd3
- 2.Bxd3#
- 2.Qc6#
- 2.Qc8#
- 1...Qb5
- 2.Rc6#
- 1...Qc3
- 2.Qxc3#
- 2.Qc6#
- 2.Qc8#
- 1...Qd4
- 2.Qc7#
- 2.Qc6#
- 2.Qc8#
- 1...Qe4
- 2.Bxe4#
- 2.Qc6#
- 2.Qc8#
- 1...Qf4
- 2.Be4#
- 2.Qc6#
- 2.Qc8#
- 1...Qg4
- 2.Be4#
- 2.Qc6#
- 2.Qc8#
- 1...Qh4
- 2.Be4#
- 2.Qc6#
- 2.Qc8#
- 1...Rb5
- 2.Sxa6#
- 2.Rc6#
- 2.Qc6#
- 2.Qc8#
- 1...Sd4
- 2.Rb7#
- 2.Rb8#
- 2.Qd6#
- 1...Sxe5!
- threat
- 1.bxa8B?
- threat
- 2.Rb7#
- 2.Rb8#
- 1...Qxd5+
- 2.Qxd5#
- 1...Qxc2
- 2.Rxc2#
- 1...Qxb4
- 2.Rxb4#
- 1...Qa2
- 2.Bb3#
- 1...Qb3
- 2.Bxb3#
- 1...Qd3
- 2.Bxd3#
- 1...Qb5
- 2.Rc6#
- 1...Qc3
- 2.Qxc3#
- 1...Qd4
- 2.Qc7#
- 1...Qe4
- 2.Bxe4#
- 1...Qf4
- 2.Be4#
- 1...Qg4
- 2.Be4#
- 1...Qh4
- 2.Be4#
- 1...Rb5
- 2.Sxa6#
- 2.Rc6#
- 1...Sxe5!
- threat
- 1.bxa8R?
- threat
- 2.Rb7#
- 2.Rbb8#
- 2.Rc8#
- 1...Qxd5+
- 2.Qxd5#
- 1...Qxc2
- 2.Rxc2#
- 2.Rc8#
- 1...Qxb4
- 2.Rc8#
- 1...Qa2
- 2.Bb3#
- 2.Rc8#
- 1...Qb3
- 2.Bxb3#
- 2.Rc8#
- 1...Qd3
- 2.Bxd3#
- 2.Rc8#
- 1...Qb5
- 2.Rc6#
- 1...Qc3
- 2.Rc8#
- 2.Qxc3#
- 1...Qd4
- 2.Rc8#
- 2.Qc7#
- 1...Qe4
- 2.Bxe4#
- 2.Rc8#
- 1...Qf4
- 2.Be4#
- 2.Rc8#
- 1...Qg4
- 2.Be4#
- 2.Rc8#
- 1...Qh4
- 2.Be4#
- 2.Rc8#
- 1...Rb5
- 2.Sxa6#
- 2.Rc6#
- 2.Rc8#
- 1...Sd4
- 2.Rb7#
- 2.Rbb8#
- 2.Qd6#
- 1...Sxe5!
- threat
- 1.d8Q?
- threat
- 2.Qdc7#
- 2.Qdd6#
- 2.Qc8#
- 1...Qxd5+
- 2.Qexd5#
- 2.Qdxd5#
- 1...Qxc2
- 2.Rxc2#
- 2.Qdc7#
- 2.Qc8#
- 1...Qxb4
- 2.Qdc7#
- 2.Qc8#
- 1...Bxb7
- 2.Rxb7#
- 2.Qdd6#
- 1...Qa2
- 2.Bb3#
- 2.Qdc7#
- 2.Qc8#
- 1...Qb3
- 2.Bxb3#
- 2.Qdc7#
- 2.Qc8#
- 1...Qd3
- 2.Bxd3#
- 2.Qdc7#
- 2.Qc8#
- 1...Qb5
- 2.Rc6#
- 1...Qc3
- 2.Qxc3#
- 2.Qdc7#
- 2.Qc8#
- 1...Qd4
- 2.Qec7#
- 2.Qdc7#
- 2.Qc8#
- 1...Qe4
- 2.Bxe4#
- 2.Qdc7#
- 2.Qc8#
- 1...Qf4
- 2.Be4#
- 2.Qdc7#
- 2.Qc8#
- 1...Qg4
- 2.Be4#
- 2.Qdc7#
- 1...Qh4
- 2.Be4#
- 2.Qdc7#
- 2.Qc8#
- 1...Se4
- 2.Qdc7#
- 2.Qc8#
- 1...Sd4
- 2.Qed6#
- 2.Qdd6#
- 1...Sxe5!
- threat
- 1.d8R?
- threat
- 2.Rc8#
- 1...Qxd5+
- 2.Qxd5#
- 1...Bxb7
- 2.Rxb7#
- 1...Qb5
- 2.Rc6#
- 1...Qg4
- 2.Be4#
- 1...Sd4
- 2.Qd6#
- 1...Sxe5!
- threat
- 1.e8Q?
- threat
- 2.Q8e7#
- 2.Qc8#
- 2.Qf8#
- 1...Qxd5+
- 2.Qxd5#
- 1...Qxc2
- 2.Rxc2#
- 2.Qc8#
- 1...Qxb4
- 2.Qc8#
- 1...Bxb7
- 2.Rxb7#
- 2.Q8e7#
- 2.Qf8#
- 1...Qa2
- 2.Bb3#
- 2.Qc8#
- 1...Qb3
- 2.Bxb3#
- 2.Qc8#
- 1...Qd3
- 2.Bxd3#
- 2.Qc8#
- 1...Qb5
- 2.Rc6#
- 1...Qc3
- 2.Qxc3#
- 2.Qc8#
- 1...Qd4
- 2.Qc7#
- 2.Qc8#
- 1...Qe4
- 2.Bxe4#
- 2.Qc8#
- 1...Qf4
- 2.Be4#
- 2.Qc8#
- 1...Qg4
- 2.Be4#
- 2.Qc8#
- 1...Qh4
- 2.Be4#
- 2.Qc8#
- 1...Se4
- 2.Qc8#
- 1...Sd4
- 2.Qd6#
- 2.Q5e7#
- 2.Q8e7#
- 2.Qf8#
- 1...Sxe5!
- threat
- 1.e8R?
- threat
- 2.Rc8#
- 1...Qxd5+
- 2.Qxd5#
- 1...Bxb7
- 2.Rxb7#
- 1...Qb5
- 2.Rc6#
- 1...Sd4
- 2.Qd6#
- 2.Qe7#
- 1...Sxe5!
- threat
- 1.Sd3+?
- Keys
- 1.d8S!
- threat
- 2.Se6#
- 1...Qxd5+
- 2.Qxd5#
- 1...Qxc2
- 2.Rxc2#
- 1...Qxb4
- 2.Rxb4#
- 1...Qa2
- 2.Bb3#
- 1...Qb3
- 2.Bxb3#
- 1...Qd3
- 2.Bxd3#
- 1...Qb5
- 2.Rc6#
- 1...Qc3
- 2.Qxc3#
- 1...Qd4
- 2.Qc7#
- 1...Qe4
- 2.Bxe4#
- 1...Qf4
- 2.Be4#
- 1...Qg4
- 2.Be4#
- 1...Qh4
- 2.Be4#
- 1...Sd4
- 2.Qd6#
- threat
- 1.d8S!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 1
- Sets
- Q(e);OGATEB::R(A)+B(C)
- Q(e);OGATEB::R(A)+B(C),XQ(e)
- Q(e);N_PINS(E),OGATEB::R(A)+B(C),XQ(e)
- Q(e);N_PINS(E),SBLOCK::B(H)+R(G),DCHECK
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAR1(F),XQ(e)
- Q(e);N_PINS(E),OGATE,P_SPINQ(e),XB(C)::R(A),XQ(e)
- Q(e);N_PINS(E),OGATEB::QAR2(F),XQ(e)
- Q(e);N_PINS(E),SBLOCK::QAR2(F)
- Q(e);N_PINS(E),OGATEB::R(A)+B(C)
- B(j);OGATE,XP(I)::B(H)+R(G),XB(j)
- S(d);SBLOCK::QAB1(F)
- Tries
- Try
- S(D);CHECK
- Vars
- Q(e);N_PINS(E),OGATE,XS(D)::R(A)+B(C),XQ(e)
- Refutation
- S(b);XS(D)
- Try
- B(C);P_PINQ(e)
- Threat
- R1(A),XQ(e)
- Vars
- S(b);XB(C)::S(D),XS(b)
- S(d);N_GUARD::QAB(F),XP(c)
- Refutation
- S(d);XQ(F)
- Try
- B(C);P_PINQ(e)
- Threat
- DUALS(8)
- Vars
- Q(e);N_PINS(E),N_SPINQ(e),XR(A)::B(H)+R(G),DCHECK
- Refutation
- R(f);XB(C)
- Try
- Q(F);CHECK,XP(c)
- Refutation
- S(d);P_SPINS(d)
- Try
- P(I);XB(j)
- Threat
- DUALS(4)
- Vars
- Q(e);N_PINS(E),SBLOCK::B(H)+R(G),DCHECK
- Refutation
- S(d);XQ(F)
- Try
- P(I);XB(j)
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAR1(F),XQ(e)
- Q(e);N_PINS(E),OGATE,P_SPINQ(e),XB(C)::R(A),XQ(e)
- Q(e);N_PINS(E),OGATE,XS(D)::B(H)+R(G),XQ(e)
- Q(e);OGATEB::R(A)+B(C)
- Q(e);OGATEB::R(A)+B(C),XQ(e)
- Q(e);N_PINS(E),OGATEB::R(A)+B(C),XQ(e)
- Q(e);N_PINS(E),SBLOCK::B(H)+R(G),DCHECK
- Q(e);N_PINS(E),OGATEB::QAR2(F),XQ(e)
- Q(e);N_PINS(E),SBLOCK::QAR2(F)
- Q(e);N_PINS(E),OGATEB::R(A)+B(C)
- Refutation
- S(d);XQ(F)
- Try
- P(I);XB(j)
- Threat
- DUALS(3)
- Vars
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAR1(F),XQ(e)
- Q(e);N_PINS(E),XS(D)::R(I)
- Q(e);N_PINS(E),SBLOCK::B(H)+R(G),DCHECK
- Refutation
- S(d);XQ(F)
- Try
- P(J);
- Threat
- DUALS(3)
- Vars
- Q(e);N_PINS(E),SBLOCK::B(H)+R(G),DCHECK
- Refutation
- S(d);XQ(F)
- Try
- P(J);
- Threat
- R(J)
- Vars
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAR1(F),XQ(e)
- B(j);OGATE,XP(I)::B(H)+R(G),XB(j)
- Q(e);N_PINS(E),SBLOCK::B(H)+R(G),DCHECK
- Q(e);N_PINS(E),OGATEB::R(A)+B(C)
- S(d);SBLOCK::QAB1(F)
- Refutation
- S(d);XQ(F)
- Try
- P(K);
- Threat
- DUALS(3)
- Vars
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAR1(F),XQ(e)
- Q(e);N_PINS(E),XS(D)::QAR(K)
- Q(e);N_PINS(E),SBLOCK::B(H)+R(G),DCHECK
- S(b);::QAR(K)
- Refutation
- S(d);XQ(F)
- Try
- P(K);
- Threat
- R(K)
- Vars
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAR1(F),XQ(e)
- B(j);OGATE,XP(I)::B(H)+R(G),XB(j)
- Q(e);N_PINS(E),SBLOCK::B(H)+R(G),DCHECK
- Refutation
- S(d);XQ(F)
- Try
- Actual
- P(J);
- Threat
- S(J)
- Vars
- Q(e);CHECK,OGATE,P_SPINQ(e),XS(E)::QAR1(F),XQ(e)
- Q(e);N_PINS(E),OGATE,P_SPINQ(e),XB(C)::R(A),XQ(e)
- Q(e);N_PINS(E),OGATE,XS(D)::B(H)+R(G),XQ(e)
- Q(e);OGATEB::R(A)+B(C)
- Q(e);OGATEB::R(A)+B(C),XQ(e)
- Q(e);N_PINS(E),OGATEB::R(A)+B(C),XQ(e)
- Q(e);N_PINS(E),SBLOCK::B(H)+R(G),DCHECK
- Q(e);N_PINS(E),OGATEB::QAR2(F),XQ(e)
- Q(e);N_PINS(E),SBLOCK::QAR2(F)
- Q(e);N_PINS(E),OGATEB::R(A)+B(C)
- S(d);SBLOCK::QAB1(F)
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).