MESON Chess Problem Database
Problem Display
PID: 7929 (2r5/8/1BpR4/P2pp3/K1kN4/p2p4/1b3Q2/1N3nrB w - - 0 1)
Lincoln, Robert A
The Problemist, 1994
#2
8 + 10
SOLUTION
- SOUND
- Sets
- 1...Ra8
- 2.Rxc6#
- 1...Rb8
- 2.Rxc6#
- 1...Rd8
- 2.Rxc6#
- 1...Re8
- 2.Rxc6#
- 1...Rf8
- 2.Rxc6#
- 1...Rg8
- 2.Rxc6#
- 1...Rh8
- 2.Rxc6#
- 1...Ba1
- 2.Qa2#
- 1...Bc1
- 2.Qa2#
- 1...Bc3
- 2.Sxa3#
- 2.Qa2#
- 1...Bxd4
- 2.Qa2#
- 1...d2
- 2.Qe2#
- 1...c5
- 2.Bxd5#
- 1...Ra8
- Tries
- 1.Se2?
- threat
- 2.Qc5#
- 1...dxe2
- 2.Qxe2#
- 1...Bd4
- 2.Sxa3#
- 1...Se3
- 2.Sd2#
- 1...d4
- 2.Qf7#
- 1...c5
- 2.Bxd5#
- 1...d2!
- threat
- 1.Sb3?
- threat
- 2.Qc5#
- 1...d2
- 2.Qe2#
- 1...Se3
- 2.S3d2#
- 1...d4
- 2.Qf7#
- 1...c5
- 2.Bxd5#
- 1...Bd4!
- threat
- 1.Sf3?
- threat
- 2.Qc5#
- 1...d2
- 2.Qe2#
- 1...Bd4
- 2.Qa2#
- 1...Se3
- 2.Sfd2#
- 1...d4
- 2.Sxe5#
- 1...c5!
- threat
- 1.Sb5?
- threat
- 2.Qc5#
- 1...d2
- 2.Qe2#
- 1...Bd4
- 2.S1xa3#
- 2.S5xa3#
- 2.Qa2#
- 1...Se3
- 2.Sd2#
- 1...d4
- 2.Qf7#
- 1...c5
- 2.Bxd5#
- 1...cxb5+!
- threat
- 1.Sf5?
- threat
- 2.Qc5#
- 1...d2
- 2.Qe2#
- 1...Bd4
- 2.Qa2#
- 1...Se3
- 2.Sxe3#
- 1...c5
- 2.Bxd5#
- 1...d4!
- threat
- 1.Sxc6?
- threat
- 2.Bxd5#
- 2.Qc5#
- 1...Rxh1
- 2.Qc5#
- 1...Rxc6
- 2.Bxd5#
- 2.Rxc6#
- 1...d2
- 2.Qe2#
- 1...Rg2
- 2.Qc5#
- 1...Bd4
- 2.Bxd5#
- 2.Qa2#
- 1...d4
- 2.Sxe5#
- 2.Bd5#
- 2.Qf7#
- 1...e4
- 2.Qc5#
- 1...Se3!
- threat
- 1.Qxb2?
- threat
- 2.Sxa3#
- 2.Qc1#
- 2.Qc3#
- 2.Qa2#
- 2.Qb3#
- 2.Qb4#
- 1...exd4
- 2.Sxa3#
- 2.Qc1#
- 2.Qxd4#
- 2.Qa2#
- 2.Qb3#
- 2.Qb4#
- 1...d2
- 2.Qc3#
- 2.Qc2#
- 2.Qb3#
- 1...Se3
- 2.Sd2#
- 2.Sxa3#
- 2.Qc3#
- 2.Qa2#
- 2.Qb3#
- 2.Qb4#
- 1...Rg2
- 2.Sxa3#
- 2.Qc3#
- 2.Qb3#
- 2.Qb4#
- 1...Sd2
- 2.Sxd2#
- 2.Sxa3#
- 2.Qc3#
- 2.Qb4#
- 1...Sh2
- 2.Sd2#
- 2.Sxa3#
- 2.Qc3#
- 2.Qa2#
- 2.Qb3#
- 2.Qb4#
- 1...Sg3
- 2.Sd2#
- 2.Sxa3#
- 2.Qc3#
- 2.Qa2#
- 2.Qb3#
- 2.Qb4#
- 1...a2
- 2.Sa3#
- 2.Qc1#
- 2.Qc3#
- 2.Qxa2#
- 2.Qb3#
- 2.Qb4#
- 1...c5
- 2.Sxa3#
- 2.Bxd5#
- 2.Qc3#
- 1...axb2!
- threat
- 1.Qc2+?
- 1...Bc3
- 2.Sxa3#
- 2.Qb3#
- 2.Qa2#
- 2.Qxc3#
- 1...dxc2!
- 1...Bc3
- 1.Se2?
- Keys
- 1.Sc2!
- threat
- 2.Qc5#
- 1...dxc2
- 2.Qe2#
- 1...d2
- 2.Qe2#
- 1...Bd4
- 2.Scxa3#
- 1...Se3
- 2.Sxe3#
- 1...d4
- 2.Qf7#
- 1...c5
- 2.Bxd5#
- threat
- 1.Sc2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 3
- REMOVED MATES = 9
- Sets
- R(j);N_GUARD,P_PINP(F)::R(H),XP(i)
- R(j);N_GUARD::R(H),XP(i)
- B(c);OGATE::QAB(C)
- B(c);OGATE,XS(E)::QAB(C)
- P(e);OGATEB::QAB(C)
- P(i);N_GUARD::B(B),XP(g)
- Tries
- Try
- S(E);
- Threat
- QAR1(C)
- Vars
- P(e);OGATE,XS(E)::QAB(C),XP(e)
- B(c);N_GUARD::S(A),XP(d)
- S(a);N_GUARD::S(A)
- P(g);OGATEB::QAB(C)
- P(i);N_GUARD::B(B),XP(g)
- Refutation
- P(e);
- Try
- S(E);
- Threat
- QAR1(C)
- Vars
- P(e);OGATEB::QAB(C)
- S(a);N_GUARD::S(E)
- P(g);OGATEB::QAB(C)
- P(i);N_GUARD::B(B),XP(g)
- Refutation
- B(c);
- Try
- S(E);
- Threat
- QAR1(C)
- Vars
- P(e);OGATEB::QAB(C)
- B(c);OGATE::QAB(C)
- S(a);N_GUARD::S(E)
- P(g);S_CUTB(c)::S(E),XP(h)
- Refutation
- P(i);
- Try
- S(E);
- Threat
- QAR1(C)
- Vars
- P(e);OGATEB::QAB(C)
- S(a);N_GUARD::S(A)
- P(g);OGATEB::QAB(C)
- P(i);N_GUARD::B(B),XP(g)
- Refutation
- P(i);CHECK,XS(E)
- Try
- S(E);
- Threat
- QAR1(C)
- Vars
- P(e);OGATEB::QAB(C)
- B(c);OGATE::QAB(C)
- S(a);N_GUARD::S(E),XS(a)
- P(i);N_GUARD::B(B),XP(g)
- Refutation
- P(g);
- Try
- S(E);XP(i)
- Threat
- DUALS(2)
- Vars
- R(b);XB(B)::QAR1(C)
- P(e);OGATEB::QAB(C)
- R(b);::QAR1(C)
- P(h);::QAR1(C)
- Refutation
- S(a);
- Try
- Q(C);XB(c)
- Threat
- DUALS(6)
- Refutation
- P(d);XQ(C)
- Try
- Q(C);CHECK
- Refutation
- P(e);XQ(C)
- Try
- Actual
- S(E);
- Threat
- QAR1(C)
- Vars
- P(e);OGATEB,XS(E)::QAB(C)
- P(e);OGATEB::QAB(C)
- B(c);N_GUARD::S(E),XP(d)
- S(a);N_GUARD::S(E),XS(a)
- P(g);OGATEB::QAB(C)
- P(i);N_GUARD::B(B),XP(g)
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