MESON Chess Problem Database
Problem Display
PID: 224182 (K6B/p2PP3/p1P1q2p/5R1r/2kP4/1RN5/B3P1Q1/2b5 w - - 0 1)
Becker, Christopher Bennett
US Problem Bulletin, 1965
#2
12 + 7
SOLUTION
- SOUND
- Sets
- 1...Qd5
- 2.Qxd5#
- 1...Qg8+
- 2.Qxg8#
- 1...Qxe2
- 2.Qxe2#
- 1...Qe3
- 2.Qd5#
- 1...Qxc6+
- 2.Qxc6#
- 1...Qf6
- 2.Qd5#
- 1...Qg6
- 2.Qd5#
- 1...Qxe7
- 2.Qd5#
- 1...Rh1
- 2.Rc5#
- 1...Rh2
- 2.Rc5#
- 1...Rh3
- 2.Rc5#
- 1...Rh4
- 2.Rc5#
- 1...Bg5
- 2.Rc5#
- 1...Qd5
- Tries
- 1.Sb1?
- threat
- 2.Rb2#
- 2.Rbb5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qg8+
- 2.Rb8#
- 2.Qxg8#
- 1...Qxc6+
- 2.Rb7#
- 2.Qxc6#
- 1...Qxf5
- 2.Rb2#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qxe2
- 2.Qd5#
- 2.Qxe2#
- 1...Rxf5
- 2.Rb2#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qf6
- 2.Qd5#
- 1...Qd5
- 2.Rb2#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 2.Qxd5#
- 1...Qe3
- 2.Qd5#
- 1...Rh3
- 2.Rc5#
- 1...Bb2
- 2.Sd2#
- 2.Rxb2#
- 2.Rbb5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qe5!
- threat
- 1.Sd1?
- threat
- 2.Rb1#
- 2.Rb2#
- 2.Rbb5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qg8+
- 2.Rb8#
- 2.Qxg8#
- 1...Qxc6+
- 2.Rb7#
- 2.Qxc6#
- 1...Qxf5
- 2.Rb1#
- 2.Rb2#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qxe2
- 2.Qd5#
- 2.Qxe2#
- 1...Rxf5
- 2.Rb1#
- 2.Rb2#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qf6
- 2.Qd5#
- 1...Qd5
- 2.Rb1#
- 2.Rb2#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 2.Qxd5#
- 1...Qe3
- 2.Qd5#
- 1...Rh3
- 2.Rc5#
- 1...Bb2
- 2.Sxb2#
- 2.Rxb2#
- 2.Rbb5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qe5!
- threat
- 1.Sa4?
- threat
- 2.Rb1#
- 2.Rb2#
- 2.Rbb5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qg8+
- 2.Rb8#
- 2.Qxg8#
- 1...Qxc6+
- 2.Rb7#
- 2.Qxc6#
- 1...Qxf5
- 2.Rb1#
- 2.Rb2#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qxe2
- 2.Qd5#
- 2.Qxe2#
- 1...Rxf5
- 2.Rb1#
- 2.Rb2#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qf6
- 2.Qd5#
- 1...Qd5
- 2.Rb1#
- 2.Rb2#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 2.Qxd5#
- 1...Qe3
- 2.Qd5#
- 1...Rh3
- 2.Rc5#
- 1...Bb2
- 2.Sxb2#
- 2.Rxb2#
- 2.Rbb5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qe5!
- threat
- 1.Sb5?
- threat
- 2.Rb1#
- 2.Rb2#
- 1...Qg8+
- 2.Qxg8#
- 1...Qxc6+
- 2.Qxc6#
- 1...Qxe2
- 2.Sd6#
- 2.Qd5#
- 2.Qxe2#
- 1...Qe3
- 2.Sd6#
- 2.Qd5#
- 1...Rh3
- 2.Rc5#
- 1...Bb2
- 2.Rxb2#
- 1...axb5!
- threat
- 1.Qf3?
- threat
- 2.Rb1#
- 2.Rb2#
- 2.Rbb5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 2.Qd3#
- 1...Qg8+
- 2.Rb8#
- 1...Qxc6+
- 2.Rb7#
- 2.Qxc6#
- 1...Qxf5
- 2.Rb1#
- 2.Rb2#
- 2.Rb5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qxe2
- 2.Rb2#
- 2.Qxe2#
- 1...Qe5
- 2.Qd3#
- 1...Qf6
- 2.Qd5#
- 2.Qd3#
- 1...Qe3
- 2.Qd5#
- 1...Qe4
- 2.Rb1#
- 2.Rb2#
- 2.Rbb5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Rh3
- 2.Rb1#
- 2.Rb2#
- 2.Rbb5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 2.Rc5#
- 1...Bb2
- 2.Rxb2#
- 2.Rbb5#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 2.Qd3#
- 1...Be3!
- threat
- 1.Sb1?
- Keys
- 1.Sd5!
- threat
- 2.Rb1#
- 2.Rb2#
- 2.Rb4#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- 1...Qg8+
- 2.Rb8#
- 1...Qxc6+
- 2.Rb7#
- 1...Qxd5
- 2.Qxd5#
- 1...Qxe2
- 2.Qxe2#
- 1...Qe5
- 2.Rb4#
- 1...Qf6
- 2.Rb4#
- 1...Qe3
- 2.Rb4#
- 1...Rh3
- 2.Rb4#
- 1...Bb2
- 2.Rxb2#
- 2.Rb4#
- 2.Rb6#
- 2.Rb7#
- 2.Rb8#
- threat
- 1.Sd5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 1
- REMOVED MATES = 6
- Sets
- Q(e);N_GUARD,P_PINP(H)::QAB1(C),XQ(e)
- Q(e);CHECK,OGATEB::QAB(C),XQ(e)
- Q(e);OGATE,XP(B)::QAB(C),XQ(e)
- Q(e);N_GUARD::QAB1(C)
- Q(e);CHECK,OGATE,XP(H)::QAR2(C),XQ(e)
- Q(e);N_GUARD,XP(J)::QAB1(C)
- R(c);N_GUARD::R1(G)
- B(a);S_CUTR(c)::R1(G)
- Tries
- Try
- S(E);
- Threat
- DUALS(5)
- Vars
- Q(e);N_GUARD::QAB1(C)
- R(c);N_GUARD::R1(G)
- Refutation
- Q(e);
- Try
- S(E);
- Threat
- DUALS(6)
- Vars
- Q(e);N_GUARD::QAB1(C)
- R(c);N_GUARD::R1(G)
- Refutation
- Q(e);
- Try
- S(E);
- Threat
- DUALS(6)
- Vars
- Q(e);N_GUARD::QAB1(C)
- R(c);N_GUARD::R1(G)
- Refutation
- Q(e);
- Try
- S(E);
- Threat
- DUALS(2)
- Vars
- Q(e);CHECK,OGATEB::QAB(C),XQ(e)
- Q(e);CHECK,OGATE,XP(H)::QAR2(C),XQ(e)
- R(c);N_GUARD::R1(G)
- B(a);::B(A)+R(D),XB(a)
- Refutation
- P(d);XS(E)
- Try
- Q(C);
- Threat
- DUALS(7)
- Vars
- Q(e);CHECK::B(A)+R(D)
- Q(e);::QAB1(C)
- Q(e);N_GUARD::QAB1(C)
- Refutation
- B(a);
- Try
- Actual
- S(E);
- Threat
- DUALS(6)
- Vars
- Q(e);CHECK::B(A)+R(D)
- Q(e);CHECK,XP(H)::B(A)+R(D)
- Q(e);OGATE,P_PINP(H),XS(E)::QAB1(C),XQ(e)
- Q(e);OGATE,XP(B)::QAB(C),XQ(e)
- Q(e);::B(A)+R(D),DCHECK
- R(c);::B(A)+R(D),DCHECK
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