MESON Chess Problem Database
Problem Display
PID: 49205 (n7/3B4/K1PpNr2/1p1kn2R/1Q1N1p2/p1pb1P2/3q1p2/2rR4 w - - 0 1)
Larsen, Lars Aksglade (= Aksglade, Lars)
Schach-Express, 1949
#2
9 + 13
| 45 | Schach | 1951 |
SOLUTION
- SOUND
- Sets
- 1...Rxe6
- 2.Bxe6#
- 1...Bb1
- 2.Qb3#
- 2.Qxb5#
- 1...Bc2
- 2.Qxb5#
- 1...Be4
- 2.Qb3#
- 2.Qxb5#
- 1...Bf5
- 2.Qxb5#
- 1...Bg6
- 2.Qb3#
- 2.Qxb5#
- 1...Bh7
- 2.Qb3#
- 2.Qxb5#
- 1...Sb6
- 2.Sc7#
- 1...Sc7+
- 2.Sxc7#
- 1...Rxe6
- Tries
- 1.Sc2?
- threat
- 2.Qd4#
- 1...Sc7+
- 2.Sxc7#
- 1...Bxc2
- 2.Qxb5#
- 1...Qe3
- 2.Qb3#
- 1...Bf1
- 2.Qe4#
- 1...Be2
- 2.Qe4#
- 1...Be4
- 2.Qb3#
- 2.Qxe4#
- 2.Qxb5#
- 2.fxe4#
- 1...Bf5
- 2.Sxf4#
- 2.Qxb5#
- 1...Bg6
- 2.Qb3#
- 2.Qxb5#
- 1...Bh7
- 2.Qb3#
- 2.Qxb5#
- 1...Bc4!
- threat
- 1.Se2?
- threat
- 2.Qd4#
- 1...Sc7+
- 2.Sxc7#
- 1...Bxe2
- 2.Qe4#
- 1...Qe3
- 2.Qb3#
- 1...Bb1
- 2.Qb3#
- 2.Qxb5#
- 1...Bc2
- 2.Sxc3#
- 2.Qxb5#
- 1...Be4
- 2.Qb3#
- 2.Qxe4#
- 2.Qxb5#
- 2.fxe4#
- 1...Bf5
- 2.S2xf4#
- 2.S6xf4#
- 2.Qxb5#
- 1...Bg6
- 2.Qb3#
- 2.Qxb5#
- 1...Bh7
- 2.Qb3#
- 2.Qxb5#
- 1...Bc4!
- threat
- 1.Sf5?
- threat
- 2.Se7#
- 2.Qd4#
- 1...Sc7+
- 2.Sxc7#
- 1...Rxf5
- 2.Qd4#
- 1...Rxe6
- 2.Qd4#
- 1...Bxf5
- 2.Sxf4#
- 2.Qxb5#
- 1...Sxf3
- 2.Se3#
- 2.Se7#
- 1...Sxc6
- 2.Se3#
- 2.Se7#
- 1...Sc4
- 2.Se3#
- 2.Se7#
- 2.Qxb5#
- 1...Bc4
- 2.Se7#
- 2.Sxf4#
- 2.Qxd6#
- 1...Qe3
- 2.Se7#
- 1...Rf7
- 2.Qd4#
- 1...Bb1
- 2.Se7#
- 2.Sxf4#
- 2.Qxb5#
- 1...Bf1
- 2.Se7#
- 2.Sxf4#
- 2.Qe4#
- 1...Bc2
- 2.Se7#
- 2.Sxf4#
- 2.Qxb5#
- 1...Be2
- 2.Se7#
- 2.Sxf4#
- 2.Qe4#
- 1...Be4
- 2.Se7#
- 2.Sxf4#
- 2.Qxe4#
- 2.Qxb5#
- 2.fxe4#
- 1...Sxd7!
- threat
- 1.Sxf4+?
- 1...Rxf4
- 2.Be6#
- 1...Qxf4!
- 1...Rxf4
- 1.Rxe5+?
- 1...dxe5
- 2.Qc5#
- 1...Kxe5!
- 1...dxe5
- 1.Qxd6+?
- 1...Kc4
- 2.Qc5#
- 1...Kxd6!
- 1...Kc4
- 1.c7?
- threat
- 2.Bc6#
- 1...Sxc7+
- 2.Sxc7#
- 1...Bf5
- 2.Qxb5#
- 1...Rf5!
- threat
- 1.Sc2?
- Keys
- 1.Sxb5!
- threat
- 2.Qd4#
- 1...Bxb5+
- 2.Qxb5#
- 1...Sc7+
- 2.Sxc7#
- 1...Bc4
- 2.Qxd6#
- 1...Qe3
- 2.Qb3#
- 1...Bb1
- 2.Qb3#
- 1...Bf1
- 2.Qe4#
- 1...Bc2
- 2.Sxc3#
- 1...Be2
- 2.Qe4#
- 1...Be4
- 2.Qb3#
- 2.Qxe4#
- 2.fxe4#
- 1...Bf5
- 2.Sxf4#
- 1...Bg6
- 2.Qb3#
- 1...Bh7
- 2.Qb3#
- threat
- 1.Sxb5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 8
- REMOVED MATES = 2
- Sets
- R(l);OGATE,XS(H)::B(I),XR(l)
- B(f);N_GUARD::QAR2(C),XP(h)
- B(f);N_GUARD,N_SPINS(j)::QAR2(C),XP(h)
- S(m);N_GUARD::S(H)
- S(m);CHECK,N_GUARD::S(H),XS(m)
- Tries
- Try
- S(D);
- Threat
- QAR1(C)
- Vars
- S(m);CHECK,N_GUARD::S(H),XS(m)
- B(f);N_GUARD,P_SPINQ(b),XS(D)::QAR2(C),XP(h)
- Q(b);P_SPINB(f)::QAB(C)
- B(f);N_GUARD,P_SPINQ(b)::QAB1(C)
- Refutation
- B(f);P_SPINQ(b)
- Try
- S(D);
- Threat
- QAR1(C)
- Vars
- S(m);CHECK,N_GUARD::S(H),XS(m)
- B(f);N_GUARD,P_SPINQ(b),XS(D)::QAB1(C)
- Q(b);P_SPINB(f)::QAB(C)
- Refutation
- B(f);P_SPINQ(b)
- Try
- S(D);N_PINS(j)
- Threat
- DUALS(2)
- Vars
- S(m);CHECK,N_GUARD::S(H),XS(m)
- R(l);XS(D)::QAR1(C)
- R(l);XS(H)::QAR1(C)
- Q(b);P_SPINB(f)::S(D)
- R(l);::QAR1(C)
- Refutation
- S(j);XB(I)
- Try
- S(H);CHECK,XP(g)
- Vars
- R(l);XS(H)::B(I)
- Refutation
- Q(b);XS(H)
- Try
- R(E);CHECK,XS(j)
- Vars
- P(k);SBLOCK,XR(E)::QAR1(C)
- Refutation
- K(i);P-FLIGHT,XR(E)
- Try
- Q(C);CHECK,XP(k)
- Vars
- K(i);N_SPINS(j),S_FLIGHT::QAR1(C)
- Refutation
- K(i);N_SPINS(j),P-FLIGHT,XQ(C)
- Try
- P(G);
- Threat
- B(I)
- Vars
- S(m);CHECK,XP(G)::S(H),XS(m)
- B(f);N_GUARD,N_SPINS(j)::QAR2(C),XP(h)
- Refutation
- R(l);N_SPINS(j)
- Try
- Actual
- S(D);P_SPINS(D),XP(h)
- Threat
- QAR1(C)
- Vars
- B(f);CHECK,OGATE,P_SPINQ(b),XS(D)::QAR2(C),XB(f)
- S(m);CHECK,N_GUARD::S(H),XS(m)
- B(f);P_SPINQ(b),SBLOCK::QAR1(C),XP(k)
- Q(b);P_SPINB(f)::QAB(C)
- B(f);N_GUARD,N_PINS(D),P_SPINQ(b)::QAB(C)
- B(f);N_GUARD,P_SPINQ(b)::QAB1(C)
- B(f);N_PINS(D),P_SPINQ(b)::S(D),XP(e)
- B(f);N_PINS(D),N_SPINS(j),P_SPINQ(b),S_CUTR(l)::S(H),XP(g)
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).