MESON Chess Problem Database
Problem Display
PID: 53268 (2K1N1n1/2PBp3/2NP4/2rk1P2/1P1P2R1/1P2RnQ1/2rpP2b/7q w - - 0 1)
Larsen, Lars Aksglade (= Aksglade, Lars)
Schach-Express, 1950
#2
14 + 9
SOLUTION
- SOUND
- Sets
- 1...Qa1
- 2.Qxf3#
- 1...Qb1
- 2.Qxf3#
- 1...Qc1
- 2.Qxf3#
- 1...Qd1
- 2.Qxf3#
- 1...Qe1
- 2.Qxf3#
- 1...Qg1
- 2.Qxf3#
- 1...Rxc6
- 2.Be6#
- 1...Se1
- 2.Re5#
- 1...Sg1
- 2.Re5#
- 1...Sxd4
- 2.Re5#
- 2.Rxd4#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sg5
- 2.Re5#
- 1...Sf6
- 2.Sxe7#
- 1...Sh6
- 2.Sxe7#
- 1...Qa1
- Tries
- 1.Kb7?
- threat
- 2.Be6#
- 1...Sxd4
- 2.Re5#
- 2.Rxd4#
- 1...Sg5
- 2.Re5#
- 1...e6
- 2.Bxe6#
- 1...Rb5+!
- threat
- 1.Sa7?
- threat
- 2.Be6#
- 1...Sxd4
- 2.Re5#
- 1...Sg5
- 2.Re5#
- 1...e6
- 2.Bxe6#
- 1...Rxc7+!
- threat
- 1.Sb8?
- threat
- 2.Be6#
- 1...Sxd4
- 2.Re5#
- 1...Sg5
- 2.Re5#
- 1...e6
- 2.Bxe6#
- 1...Rxc7+!
- threat
- 1.Sd8?
- threat
- 2.Be6#
- 1...Sxd4
- 2.Re5#
- 1...Sg5
- 2.Re5#
- 1...e6
- 2.Bxe6#
- 1...Rxc7+!
- threat
- 1.Sf6+?
- 1...Sxf6
- 2.Sxe7#
- 1...exf6!
- 1...Sxf6
- 1.Rd3?
- threat
- 2.e4#
- 1...Sxd4
- 2.Rdxd4#
- 2.Rgxd4#
- 1...Qe1
- 2.Qxf3#
- 1...Sg1
- 2.dxc5#
- 1...Sh4
- 2.dxc5#
- 1...Se5
- 2.dxe5#
- 1...Sg5
- 2.dxc5#
- 1...Sf6
- 2.Sxe7#
- 1...Se1!
- threat
- 1.Rxf3?
- threat
- 2.e4#
- 1...Qxf3
- 2.Qxf3#
- 1...Rxc6
- 2.Be6#
- 1...Sf6
- 2.Sxe7#
- 1...Qe1!
- threat
- 1.Re6?
- threat
- 2.e4#
- 1...Sxd4
- 2.Rxd4#
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Qe1
- 2.Qxf3#
- 1...Sg1
- 2.Re5#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sg5
- 2.Re5#
- 1...Sf6
- 2.Sxe7#
- 1...Rxc6!
- threat
- 1.Qf4?
- threat
- 2.Qe4#
- 1...Sxd4
- 2.Re5#
- 2.Qxd4#
- 1...Se1
- 2.Re5#
- 1...Sg1
- 2.Re5#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sg5
- 2.Re5#
- 1...Sf6
- 2.Sxe7#
- 1...Bxf4!
- threat
- 1.bxc5?
- threat
- 2.Sb4#
- 1...Sxd4
- 2.Re5#
- 1...Rc4!
- threat
- 1.b5?
- threat
- 2.Sb4#
- 2.Be6#
- 1...Rxc6
- 2.Be6#
- 1...Sxd4
- 2.Sb4#
- 2.Re5#
- 2.Rxd4#
- 1...R2c4
- 2.Be6#
- 1...R5c4
- 2.Be6#
- 1...Sg5
- 2.Sb4#
- 2.Re5#
- 1...e6
- 2.Sb4#
- 2.Bxe6#
- 1...Rxb5!
- threat
- 1.Kb7?
- Keys
- 1.Rxe7!
- threat
- 2.e4#
- 1...Sxe7+
- 2.Sxe7#
- 1...Rxc6
- 2.Be6#
- 1...Sxd4
- 2.Rxd4#
- 2.Re5#
- 1...Se1
- 2.Re5#
- 1...Qe1
- 2.Qxf3#
- 1...Sg1
- 2.Re5#
- 1...Sh4
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sg5
- 2.Re5#
- 1...Sf6
- 2.Sxf6#
- threat
- 1.Rxe7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 6
- Sets
- Q(a);N_GUARD::QAB(D),XS(e)
- R(f);P_PINP(K),SBLOCK,XS(I)::B(L)
- S(e);N_GUARD::R1(C)
- S(e);N_GUARD::R1(C),XS(e)
- S(i);N_GUARD::S(I),XP(h)
- Tries
- Try
- K(M);S_FLIGHT
- Threat
- B(L)
- Vars
- S(e);N_GUARD::R1(C)
- P(h);::B(L),XP(h)
- Refutation
- R(f);CHECK
- Try
- S(I);P_SPINP(K)
- Threat
- B(L)
- Vars
- S(e);N_GUARD,XP(F)::R1(C)
- S(e);N_GUARD::R1(C)
- P(h);::B(L),XP(h)
- Refutation
- R(f);CHECK,XP(K)
- Try
- S(I);P_SPINP(K)
- Threat
- B(L)
- Vars
- S(e);N_GUARD,XP(F)::R1(C)
- S(e);N_GUARD::R1(C)
- P(h);::B(L),XP(h)
- Refutation
- R(f);CHECK,XP(K)
- Try
- S(I);P_SPINP(K)
- Threat
- B(L)
- Vars
- S(e);N_GUARD,XP(F)::R1(C)
- S(e);N_GUARD::R1(C)
- P(h);::B(L),XP(h)
- Refutation
- R(f);CHECK,XP(K)
- Try
- S(N);CHECK
- Vars
- S(i);XS(N)::S(I),XP(h)
- Refutation
- P(h);XS(N)
- Try
- R(C);
- Threat
- P(A)
- Vars
- Q(a);N_GUARD::QAB(D),XS(e)
- S(e);N_GUARD::R(C)+P(F),XR(f)
- S(e);OGATE::R(C)+P(F),XS(e)
- S(i);N_GUARD::S(I),XP(h)
- Refutation
- S(e);
- Try
- R(C);XS(e)
- Threat
- P(A)
- Vars
- Q(a);OGATE,XR(C)::QAB(D),XQ(a)
- R(f);P_PINP(K),SBLOCK,XS(I)::B(L)
- S(i);N_GUARD::S(I),XP(h)
- Refutation
- Q(a);
- Try
- R(C);
- Threat
- P(A)
- Vars
- S(e);N_GUARD::R1(C)
- Q(a);N_GUARD::QAB(D),XS(e)
- S(e);N_GUARD::R1(C),XS(e)
- S(i);N_GUARD::S(I),XP(h)
- Refutation
- R(f);P_PINP(K),XS(I)
- Try
- Q(D);
- Threat
- QAB1(D)
- Vars
- S(e);N_GUARD::R1(C)
- S(e);N_GUARD::R1(C),XS(e)
- S(i);N_GUARD::S(I),XP(h)
- Refutation
- B(d);XQ(D)
- Try
- P(E);XR(f)
- Threat
- S(I)
- Vars
- S(e);N_GUARD,XP(F)::R1(C)
- Refutation
- R(b);
- Try
- P(E);
- Threat
- DUALS(2)
- Vars
- R(f);P_PINP(K),XS(I)::B(L)
- R(b);::B(L)
- R(f);::B(L)
- Refutation
- R(f);XP(E)
- Try
- Actual
- R(C);XP(h)
- Threat
- P(A)
- Vars
- S(i);CHECK,XR(C)::S(I),XS(i)
- R(f);P_PINP(K),SBLOCK,XS(I)::B(L)
- S(e);N_GUARD::R1(C)
- Q(a);N_GUARD::QAB(D),XS(e)
- S(e);N_GUARD::R1(C),XS(e)
- S(i);N_GUARD::S(N),XS(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).