MESON Chess Problem Database
Problem Display
PID: 21971 (1K6/nB2Q1B1/2p5/3PR3/bN1kP1r1/R1p5/2pNPP1b/1r3n2 w - - 0 1)
Larsen, Karl Adolf Koefoed
1st HM., Sydsvenska Dagbladet Snallposten, 1922
#2
12 + 10
SOLUTION
- SOUND
- Sets
- 1...Rb3
- 2.Sxc2#
- 1...Rxb4
- 2.Qxb4#
- 1...Rg3
- 2.Rg5#
- 1...Rf4
- 2.Rf5#
- 1...Bg1
- 2.Rg5#
- 1...Bxe5+
- 2.Bxe5#
- 1...Bb5
- 2.Sxc2#
- 1...Sg3
- 2.Rg5#
- 2.e3#
- 1...Sb5
- 2.Sxc6#
- 1...Rb3
- Tries
- 1.Rxc3?
- threat
- 2.Rd3#
- 2.Rc4#
- 2.Qc5#
- 1...Bxe5+
- 2.Bxe5#
- 2.Qxe5#
- 1...Rxb4
- 2.Rd3#
- 2.Qxb4#
- 2.Qc5#
- 1...Rxg7
- 2.Rd3#
- 2.Rc4#
- 1...Sxd2
- 2.Qc5#
- 1...cxd5
- 2.Rd3#
- 2.Qc5#
- 1...c1Q
- 2.Rd3#
- 2.Qc5#
- 1...c1S
- 2.Rc4#
- 2.Qc5#
- 1...c1R
- 2.Rd3#
- 2.Qc5#
- 1...Rb3
- 2.Rc4#
- 2.Qc5#
- 1...Rg3
- 2.Rc4#
- 2.Rg5#
- 2.Qc5#
- 1...Bb3
- 2.Rd3#
- 2.Qc5#
- 1...Bb5
- 2.Qc5#
- 1...Se3
- 2.Rd3#
- 2.Qc5#
- 1...c5
- 2.Rd3#
- 2.Rc4#
- 2.Qxc5#
- 1...Kxc3!
- threat
- 1.Rxa4?
- threat
- 2.Sxc2#
- 2.Sxc6#
- 1...Bxe5+
- 2.Bxe5#
- 1...Rxb4
- 2.Rxb4#
- 2.Qxb4#
- 1...cxd5
- 2.Sxc2#
- 2.Sc6#
- 1...c1Q
- 2.Sc2#
- 2.Sxc6#
- 1...c1S
- 2.Sc2#
- 2.Sxc6#
- 1...c1B
- 2.Sc2#
- 2.Sxc6#
- 1...c1R
- 2.Sc2#
- 2.Sxc6#
- 1...c5
- 2.Sxc2#
- 2.Sc6#
- 1...cxd2!
- threat
- 1.dxc6?
- threat
- 2.Qc5#
- 2.Qd6#
- 2.Qd8#
- 2.Qd7#
- 1...Bxe5+
- 2.Bxe5#
- 2.Qd6#
- 2.Qxe5#
- 1...Rxg7
- 2.Qc5#
- 2.Qd6#
- 1...Bxc6
- 2.Sxc2#
- 2.Qc5#
- 1...Sxd2
- 2.Qc5#
- 1...cxd2
- 2.Qc5#
- 1...Rg6
- 2.Qc5#
- 1...Bb3
- 2.Qc5#
- 1...Se3
- 2.Qc5#
- 1...Sb5
- 2.Qc5#
- 1...Sc8
- 2.Qc5#
- 1...Sxc6+!
- threat
- 1.Rxc3?
- Keys
- 1.Ba6!
- threat
- 2.Sf3#
- 1...Rxb4+
- 2.Qxb4#
- 1...Bxe5+
- 2.Bxe5#
- 1...Sxd2
- 2.e3#
- 1...cxd2
- 2.Rd3#
- 1...Rg3
- 2.Rg5#
- 1...Rf4
- 2.Rf5#
- 1...Bb5
- 2.Sxc2#
- 1...Sb5
- 2.Sxc6#
- threat
- 1.Ba6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 2
- Sets
- R(a);S_CUTB(f)::S(E),XP(c)
- R(a);OGATE,P_PINB(I),XS(E)::QAR2(J),XR(a)
- R(h);N_PINR(H)::B(K)+R(H)
- B(d);N_PINR(H)::B(K)+R(H)
- B(d);CHECK,OGATE,P_SPINB(d),XR(H)::B(K),XB(d)
- B(f);N_GUARD::S(E),XP(c)
- S(j);N_GUARD,S_CUTB(f)::S(E),XP(i)
- Tries
- Try
- R(D);XP(e)
- Threat
- DUALS(3)
- Vars
- S(b);XS(A)::QAB1(J)
- B(f);::QAB1(J)
- Refutation
- K(g);S_FLIGHT,XR(D)
- Try
- R(D);XB(f)
- Threat
- DUALS(2)
- Vars
- B(d);CHECK,OGATE,P_SPINB(d),XR(H)::B(K),XB(d)
- Refutation
- P(e);XS(A)
- Try
- P(G);XP(i)
- Threat
- DUALS(4)
- Vars
- S(b);XS(A)::QAB1(J)
- P(e);XS(A)::QAB1(J)
- R(h);::QAB1(J)
- B(f);::QAB1(J)
- S(b);::QAB1(J)
- S(j);::QAB1(J)
- Refutation
- S(j);CHECK,XP(G)
- Try
- Actual
- B(I);P_SPINS(E)
- Threat
- S(A)
- Vars
- R(a);CHECK,OGATE,XS(E)::QAR2(J),XR(a)
- B(d);CHECK,OGATE,P_SPINB(d),XR(H)::B(K),XB(d)
- S(b);N_GUARD,XS(A)::P(B)
- P(e);OGATE,XS(A)::R1(D)
- R(h);N_PINR(H)::B(K)+R(H)
- B(f);N_PINS(E)::S(E),XP(c)
- S(j);N_PINS(E)::S(E),XP(i)
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