MESON Chess Problem Database
Problem Display
PID: 6325 (K1bb4/P1p5/n1rN4/QNk3nR/p1B3R1/4Pp2/2prp3/4q3 w - - 0 1)
Larsen, Karl Adolf Koefoed
Skakbladet, 1928
#2
9 + 13
SOLUTION
- SOUND
- Sets
- 1...Rd4
- 2.exd4#
- 1...Rdxd6
- 2.Sc3#
- 1...Bf5
- 2.Sb7#
- 1...Be6
- 2.Sb7#
- 1...Bb7+
- 2.Sxb7#
- 1...Bd7
- 2.Sb7#
- 1...cxd6
- 2.Sc7#
- 1...Rd4
- Tries
- 1.Bb3?
- threat
- 2.Se4#
- 1...Bb7+
- 2.Sxb7#
- 1...Rdxd6
- 2.Sc3#
- 1...Rcxd6
- 2.Sd4#
- 1...cxd6
- 2.Sc7#
- 1...Rb6
- 2.Qc3#
- 1...Rd4
- 2.exd4#
- 1...Rd5
- 2.Rc4#
- 1...Bf5
- 2.Sb7#
- 1...axb3!
- threat
- 1.Be6?
- threat
- 2.Se4#
- 2.Rc4#
- 1...Bb7+
- 2.Sxb7#
- 1...Rdxd6
- 2.Sc3#
- 2.Rc4#
- 1...Rcxd6
- 2.Sd4#
- 2.Rc4#
- 1...cxd6
- 2.Sc7#
- 2.Rc4#
- 1...Rb6
- 2.Rc4#
- 2.Qc3#
- 1...c1Q
- 2.Se4#
- 1...c1R
- 2.Se4#
- 1...Qh4
- 2.Se4#
- 1...Rd4
- 2.exd4#
- 1...Rd5
- 2.Rc4#
- 1...Bxe6!
- threat
- 1.Bf7?
- threat
- 2.Se4#
- 2.Rc4#
- 1...Bb7+
- 2.Sxb7#
- 1...Rdxd6
- 2.Sc3#
- 2.Rc4#
- 1...Rcxd6
- 2.Sd4#
- 2.Rc4#
- 1...Bxg4
- 2.Se4#
- 2.Sb7#
- 1...cxd6
- 2.Sc7#
- 2.Rc4#
- 1...Rb6
- 2.Rc4#
- 2.Qc3#
- 1...c1Q
- 2.Se4#
- 1...c1R
- 2.Se4#
- 1...Qh4
- 2.Se4#
- 1...Rd4
- 2.exd4#
- 1...Rd5
- 2.Rc4#
- 1...Bf5
- 2.Sb7#
- 2.Rc4#
- 1...Be6!
- threat
- 1.Bg8?
- threat
- 2.Se4#
- 2.Rc4#
- 1...Bb7+
- 2.Sxb7#
- 1...Rdxd6
- 2.Sc3#
- 2.Rc4#
- 1...Rcxd6
- 2.Sd4#
- 2.Rc4#
- 1...Bxg4
- 2.Se4#
- 2.Sb7#
- 1...cxd6
- 2.Sc7#
- 2.Rc4#
- 1...Rb6
- 2.Rc4#
- 2.Qc3#
- 1...c1Q
- 2.Se4#
- 1...c1R
- 2.Se4#
- 1...Qh4
- 2.Se4#
- 1...Rd4
- 2.exd4#
- 1...Rd5
- 2.Rc4#
- 1...Bf5
- 2.Sb7#
- 2.Rc4#
- 1...Be6!
- threat
- 1.Rhxg5+?
- 1...Rd5
- 2.Rxd5#
- 1...Bf5
- 2.Sb7#
- 1...Bxg5!
- 1...Rd5
- 1.Bb3?
- Keys
- 1.Ba2!
- threat
- 2.Se4#
- 1...Bb7+
- 2.Sxb7#
- 1...Rdxd6
- 2.Sc3#
- 1...Rcxd6
- 2.Sd4#
- 1...cxd6
- 2.Sc7#
- 1...Rb6
- 2.Qc3#
- 1...Rd4
- 2.exd4#
- 1...Rd5
- 2.Rc4#
- 1...Bf5
- 2.Sb7#
- threat
- 1.Ba2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- R(c);OGATE::P(A),XR(c)
- R(c);SBLOCK,XS(G)::QAR(D)+S(E)
- B(l);N_GUARD,N_SPINS(h)::S(G)
- B(l);N_GUARD::S(G)
- B(l);CHECK,N_GUARD::S(G),XB(l)
- P(k);SBLOCK,XS(G)::QAR(D)+S(E)
- Tries
- Try
- B(B);
- Threat
- S(G)
- Vars
- B(l);CHECK,N_GUARD::S(G),XB(l)
- R(c);SBLOCK,XS(G)::QAR(D)+S(E)
- R(j);SBLOCK,XS(G)::QAR(D)+S(E)
- P(k);SBLOCK,XS(G)::QAR(D)+S(E)
- R(j);SBLOCK::QAR2(D)
- R(c);OGATE::P(A),XR(c)
- R(c);N_SPINS(h),SBLOCK::R1(C)
- B(l);N_GUARD,N_SPINS(h)::S(G)
- Refutation
- P(f);XB(B)
- Try
- B(B);
- Threat
- DUALS(2)
- Vars
- B(l);CHECK,N_GUARD::S(G),XB(l)
- P(b);::S(G)
- Q(a);::S(G)
- R(c);OGATE::P(A),XR(c)
- R(c);N_SPINS(h)::R1(C)
- Refutation
- B(l);XB(B)
- Try
- B(B);
- Threat
- DUALS(2)
- Vars
- B(l);CHECK,N_GUARD::S(G),XB(l)
- P(b);::S(G)
- Q(a);::S(G)
- R(c);OGATE::P(A),XR(c)
- R(c);N_SPINS(h)::R1(C)
- Refutation
- B(l);
- Try
- B(B);
- Threat
- DUALS(2)
- Vars
- B(l);CHECK,N_GUARD::S(G),XB(l)
- P(b);::S(G)
- Q(a);::S(G)
- R(c);OGATE::P(A),XR(c)
- R(c);N_SPINS(h)::R1(C)
- Refutation
- B(l);
- Try
- R(F);CHECK,XS(h)
- Vars
- R(c);N_GUARD,P_SPINR(c)::R1(F),XR(c)
- B(l);P_SPINB(l)::S(G)
- Refutation
- B(m);XR(F)
- Try
- Actual
- B(B);
- Threat
- S(G)
- Vars
- B(l);CHECK,N_GUARD::S(G),XB(l)
- R(c);SBLOCK,XS(G)::QAR(D)+S(E)
- R(j);SBLOCK,XS(G)::QAR(D)+S(E)
- P(k);SBLOCK,XS(G)::QAR(D)+S(E)
- R(j);SBLOCK::QAR2(D)
- R(c);OGATE::P(A),XR(c)
- R(c);N_SPINS(h),SBLOCK::R1(C)
- B(l);N_GUARD,N_SPINS(h)::S(G)
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