MESON Chess Problem Database
Problem Display
PID: 62337 (2BR1r2/K1kbP3/1p5b/2PpN1B1/5Qn1/p3p2q/7p/5r2 w - - 0 1)
Morra, Juan Carlos
Schakend Nederland, 1961
#2
8 + 12
SOLUTION
- SOUND
- Sets
- 1...Rxd8
- 2.exd8Q#
- 1...Ba4
- 2.cxb6#
- 1...Bb5
- 2.cxb6#
- 1...Bf5
- 2.cxb6#
- 1...Bc6
- 2.cxb6#
- 1...Be6
- 2.cxb6#
- 1...Bxc8
- 2.cxb6#
- 1...Be8
- 2.cxb6#
- 1...Rxd8
- Tries
- 1.exf8Q?
- threat
- 2.Rxd7#
- 2.Qd6#
- 2.cxb6#
- 1...Bxg5
- 2.Rxd7#
- 2.cxb6#
- 1...Bxc8
- 2.Rxc8#
- 2.Qd6#
- 2.cxb6#
- 1...Sxe5
- 2.Qd6#
- 1...bxc5
- 2.Rxd7#
- 1...Sf2
- 2.Qd6#
- 2.cxb6#
- 1...Rb1
- 2.Rxd7#
- 2.Qd6#
- 1...Ba4
- 2.Qd6#
- 2.cxb6#
- 1...Bb5
- 2.Qd6#
- 2.cxb6#
- 1...Bf5
- 2.Qd6#
- 2.cxb6#
- 1...Bc6
- 2.Qd6#
- 2.cxb6#
- 1...Be6
- 2.Qd6#
- 2.cxb6#
- 1...Be8
- 2.Qd6#
- 2.cxb6#
- 1...Sf6
- 2.cxb6#
- 1...b5
- 2.Rxd7#
- 2.Qd6#
- 1...Bxf8!
- threat
- 1.e8S+?
- 1...Bxe8
- 2.cxb6#
- 1...Rxe8!
- 1...Bxe8
- 1.exf8Q?
- Keys
- 1.Bb7!
- threat
- 2.Rxd7#
- 1...Rxd8
- 2.exd8Q#
- 2.exd8B#
- 1...Sxe5
- 2.Qxe5#
- 1...Ba4
- 2.cxb6#
- 1...Bb5
- 2.cxb6#
- 1...Bf5
- 2.cxb6#
- 1...Bc6
- 2.cxb6#
- 1...Be6
- 2.cxb6#
- 1...Bc8
- 2.cxb6#
- 1...Be8
- 2.Rc8#
- 2.cxb6#
- 1...Sf2
- 2.Sf7#
- 1...Sf6
- 2.Sf3#
- threat
- 1.Bb7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 2
- Sets
- R(l);OGATE,XR(H)::PXR(l)=Q
- B(k);::P(B),XP(h)
- B(k);XB(G)::P(B),XP(h)
- Tries
- Try
- P(F);XR(l)
- Threat
- DUALS(3)
- Vars
- S(f);P_SPINS(f),XS(C)::QAB1(F)
- P(h);XP(B)::R1(H),XB(k)
- S(f);::P(B),XP(h)
- Refutation
- B(i);XQ(F)
- Try
- P(F);CHECK
- Vars
- B(k);XS(F)::P(B),XP(h)
- Refutation
- R(l);XS(F)
- Try
- Actual
- B(G);
- Threat
- R1(H),XB(k)
- Vars
- R(l);OGATE,XR(H)::PXR(l)=Q
- S(f);OGATE,P_SPINS(f),XS(C)::QAB(A),XS(f)
- B(k);::P(B),XP(h)
- S(f);N_GUARD,S_CUTR(a)::QAB(A)+S(C)
- S(f);N_GUARD,S_CUTR(l)::QAB(A)+S(C)
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