MESON Chess Problem Database
Problem Display
PID: 253151 (4R3/b3N1Bn/r2p4/1pp1Np1b/4kP2/1q1R1pK1/B1P1PPp1/6r1 w - - 0 1)
Larsen, Lars Aksglade (= Aksglade, Lars)
Die Schwalbe, 1965
#2
11 + 13
SOLUTION
- SOUND
- Sets
- 1...Qxc2
- 2.Bd5#
- 1...Qa4
- 2.Bd5#
- 1...Qd5
- 2.Bxd5#
- 1...Qb1
- 2.Bd5#
- 1...Qb2
- 2.Bd5#
- 1...Qa3
- 2.Bd5#
- 1...Qc3
- 2.Bd5#
- 1...Qb4
- 2.Bd5#
- 1...Bg6
- 2.exf3#
- 1...Bf7
- 2.exf3#
- 1...Bxe8
- 2.exf3#
- 1...Qxc2
- Tries
- 1.Sxf3?
- threat
- 2.Sd2#
- 1...Qxc2
- 2.Sg6#
- 2.Bd5#
- 2.Re3#
- 1...Qxd3
- 2.Sg6#
- 2.cxd3#
- 2.exd3#
- 1...Bxf3
- 2.Sd5#
- 2.exf3#
- 1...Qc3
- 2.Bd5#
- 1...Qb4
- 2.Sg6#
- 2.Bd5#
- 2.Re3#
- 1...Rd1!
- threat
- 1.Sc4?
- threat
- 2.Sd2#
- 2.Sg6#
- 1...Qxc2
- 2.Sg6#
- 2.Re3#
- 1...Qxc4
- 2.Re3#
- 1...Qxd3
- 2.cxd3#
- 2.exd3#
- 1...Bxe8
- 2.Sd2#
- 2.exf3#
- 1...bxc4
- 2.Sg6#
- 1...Qb2
- 2.Sd2#
- 2.Re3#
- 1...Qb4
- 2.Sg6#
- 2.Re3#
- 1...Rd1
- 2.Sg6#
- 1...Bg6
- 2.Sd2#
- 2.Sxg6#
- 2.exf3#
- 1...Bf7
- 2.Sd2#
- 2.exf3#
- 1...Sg5
- 2.Sd2#
- 1...Sf6
- 2.Sd2#
- 1...Sf8
- 2.Sd2#
- 1...d5
- 2.Sd2#
- 1...Qc3!
- threat
- 1.Sg4?
- threat
- 2.exf3#
- 1...Qxc2
- 2.Sg6#
- 2.Bd5#
- 2.Re3#
- 1...Qxd3
- 2.Sg6#
- 2.cxd3#
- 2.exd3#
- 1...Bxg4
- 2.Sd5#
- 1...fxe2
- 2.f3#
- 1...Sg5
- 2.Sf6#
- 1...fxg4!
- threat
- 1.Sd5?
- threat
- 2.Sg6#
- 2.Sf7#
- 1...Qxd5
- 2.Bxd5#
- 1...Bxe8
- 2.exf3#
- 1...dxe5
- 2.Rxe5#
- 1...Qc3
- 2.Sxc3#
- 1...Bg6
- 2.Sxg6#
- 2.Sf7#
- 2.exf3#
- 1...Bf7
- 2.Sxf7#
- 2.exf3#
- 1...Sg5
- 2.Sf6#
- 1...Sf6
- 2.Sxf6#
- 1...Sf8
- 2.Sf6#
- 1...Qb2!
- threat
- 1.c3?
- threat
- 2.Re3#
- 1...Qxc3
- 2.Bd5#
- 1...c4!
- threat
- 1.Sxf3?
- Keys
- 1.Sf7!
- threat
- 2.Sd5#
- 1...Qxf7
- 2.Re3#
- 1...Bxf7
- 2.exf3#
- 1...Qd5
- 2.Sxd5#
- 2.Bxd5#
- 2.Re3#
- 1...Qe6
- 2.Re3#
- 1...Qb2
- 2.Bd5#
- 2.Re3#
- 1...Qc3
- 2.Bd5#
- 1...Sg5
- 2.Sxg5#
- 1...Sf6
- 2.Sg5#
- 1...Sf8
- 2.Sg5#
- 1...d5
- 2.Sc6#
- threat
- 1.Sf7!
This is a version
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 6
- REMOVED MATES = 9
- Sets
- Q(c);OGATE,XP(B)::B(A)
- Q(c);OGATE::B(A)
- Q(c);OGATE::B(A),XQ(c)
- B(i);N_GUARD::P(C),XP(d)
- B(i);N_GUARD,XR(K)::P(C),XP(d)
- Tries
- Try
- S(H);XP(d)
- Threat
- S(H)
- Vars
- Q(c);OGATE::B(A)
- Refutation
- R(a);
- Try
- S(H);
- Threat
- DUALS(2)
- Vars
- Q(c);N_GUARD,XS(H)::R1(E)
- P(f);XS(H)::R(K)+S(I)
- R(a);::R(K)+S(I)
- S(m);::S(H)
- P(k);::S(H)
- Refutation
- Q(c);
- Try
- S(H);
- Threat
- P(C),XP(d)
- Vars
- B(i);N_GUARD,XS(H)::R(K)+S(I)
- P(d);OGATE,P_PINR(E),XP(C)::P(D)
- S(m);N_GUARD::S(H)
- Refutation
- P(h);XS(H)
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- Q(c);OGATE,XS(I)::B(A),XQ(c)
- B(i);N_GUARD,XR(K)::P(C),XP(d)
- P(k);OGATE,P_SPINP(k),XS(H)::R1(K),XP(k)
- Q(c);N_GUARD::S(I),XQ(c)
- S(m);N_GUARD::S(I)
- S(m);N_GUARD::S(I),XS(m)
- Refutation
- Q(c);
- Try
- P(B);
- Threat
- R1(E)
- Vars
- Q(c);OGATE,XP(B)::B(A)
- Refutation
- P(g);
- Try
- Actual
- S(H);
- Threat
- R(K)+S(I)
- Vars
- Q(c);N_GUARD,XS(H)::R1(E)
- B(i);N_GUARD,XS(H)::P(C),XP(d)
- Q(c);N_GUARD::R1(E)
- Q(c);OGATE::B(A)
- S(m);N_GUARD::S(H),XS(m)
- S(m);N_GUARD::S(H)
- P(k);S_CUTQ(c)::R(K)+S(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).