MESON Chess Problem Database
Problem Display
PID: 179520 (8/1Q3n1B/P2R4/p1N1p3/r1k4K/qN2R3/4n3/1b2B3 w - - 0 1)
Lepage, Roger
Sans, Jean
diagrammes, 1974
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxc5
- 2.Sd2#
- 1...Ba2
- 2.Bd3#
- 1...Bd3
- 2.Bxd3#
- 1...Sc1
- 2.Rc3#
- 1...Sg1
- 2.Rc3#
- 1...Sc3
- 2.Rxc3#
- 1...Sg3
- 2.Rc3#
- 1...Sd4
- 2.Rc3#
- 1...Sf4
- 2.Rc3#
- 1...Qxc5
- Tries
- 1.Sxa4?
- threat
- 2.Sd2#
- 2.Sxa5#
- 2.Qd5#
- 1...Qxd6
- 2.Sb2#
- 1...Qxb3
- 2.Qd5#
- 2.Qc6#
- 2.Qxb3#
- 1...Qxa4
- 2.Qd5#
- 1...Qc1
- 2.Sxa5#
- 2.Qd5#
- 2.Qc6#
- 1...Qb2
- 2.Sxa5#
- 2.Sxb2#
- 2.Qd5#
- 2.Qc6#
- 1...Qb4
- 2.Sb2#
- 2.Qd5#
- 1...Qc5
- 2.Sd2#
- 2.Sb2#
- 1...Qa2
- 2.Sxa5#
- 2.Qd5#
- 2.Qc6#
- 1...Be4
- 2.Sd2#
- 2.Sxa5#
- 1...Sc3
- 2.Sd2#
- 2.Sxa5#
- 2.Rxc3#
- 1...Sf4
- 2.Sd2#
- 2.Sxa5#
- 2.Rc3#
- 1...Sxd6!
- threat
- 1.Se6?
- threat
- 2.Sd2#
- 2.Qd5#
- 1...Qxb3
- 2.Qd5#
- 2.Qc6#
- 2.Qxb3#
- 1...Sxd6
- 2.Sd2#
- 1...Qc1
- 2.Qd5#
- 2.Qc6#
- 1...Qb2
- 2.Qd5#
- 2.Qc6#
- 1...Qb4
- 2.Qd5#
- 1...Qc5
- 2.Sd2#
- 1...Qa2
- 2.Qd5#
- 2.Qc6#
- 1...Bd3
- 2.Bxd3#
- 2.Qd5#
- 1...Be4
- 2.Sd2#
- 1...Sc3
- 2.Sd2#
- 2.Rxc3#
- 1...Sf4
- 2.Sd2#
- 2.Rc3#
- 1...Qxd6!
- threat
- 1.Sd7?
- threat
- 2.Sd2#
- 2.Qd5#
- 1...Qxb3
- 2.Qd5#
- 2.Qc6#
- 2.Qxb3#
- 1...Sxd6
- 2.Sxe5#
- 1...Qc1
- 2.Qd5#
- 2.Qc6#
- 1...Qb2
- 2.Qd5#
- 2.Qc6#
- 1...Qb4
- 2.Qd5#
- 1...Qc5
- 2.Sd2#
- 1...Qa2
- 2.Qd5#
- 2.Qc6#
- 1...Bd3
- 2.Bxd3#
- 2.Qd5#
- 1...Be4
- 2.Sd2#
- 1...Sc3
- 2.Sd2#
- 2.Rxc3#
- 1...Sf4
- 2.Sd2#
- 2.Rc3#
- 1...Qxd6!
- threat
- 1.Rd4+?
- 1...Sxd4
- 2.Rc3#
- 1...exd4!
- 1...Sxd4
- 1.Sxa4?
- Keys
- 1.Sd3!
- threat
- 2.Qd5#
- 1...Qxd6
- 2.Sb2#
- 1...Sxd6
- 2.Sxe5#
- 1...Qc5
- 2.Sb2#
- 1...Sc3
- 2.Sd2#
- 1...Sf4
- 2.Re4#
- threat
- 1.Sd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 2
- REMOVED MATES = 6
- Sets
- Q(c);SBLOCK,XS(E)::S(B)
- B(a);N_GUARD::B(I)
- B(a);N_GUARD::B(I),XB(a)
- S(b);N_GUARD::R1(C)
- S(b);N_GUARD::R1(C),XS(b)
- Tries
- Try
- S(E);XR(d)
- Threat
- DUALS(3)
- Vars
- Q(c);N_GUARD,XR(G)::S(E)
- Q(c);XS(E)::QAB1(H)
- Refutation
- S(h);XR(G)
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- S(h);XR(G)::S(B)
- Q(c);::QAB1(H)
- Q(c);::S(B)
- B(a);::S(B)
- Refutation
- Q(c);XR(G)
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- S(h);N_GUARD,XR(G)::S(E),XP(g)
- Q(c);::QAB1(H)
- Q(c);::S(B)
- B(a);::S(B)
- Refutation
- Q(c);XR(G)
- Try
- R(G);CHECK
- Vars
- S(b);XR(G)::R1(C)
- Refutation
- P(g);XR(G)
- Try
- Actual
- S(E);
- Threat
- QAB1(H)
- Vars
- Q(c);N_GUARD,XR(G)::S(E)
- S(h);N_GUARD,XR(G)::S(E),XP(g)
- Q(c);N_GUARD::S(E)
- S(b);SBLOCK::S(B)
- S(b);N_GUARD::R(C)
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