MESON Chess Problem Database
Problem Display
PID: 165333 (8/kp6/p7/4B3/4B3/2K5/Q7/8 w - - 0 1)
Skuja, Roberts
10th HM., Chuvash Board of Physical Culture, 1956
#2
4 + 3
| 133 | The Problemist Supplement | 2017 |
SOLUTION
- SOUND
- Sets
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b5
- 2.Qf2#
- 1...b6
- 2.Qf7#
- 1...Ka8
- Tries
- 1.Kd3?
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b5
- 2.Qf2#
- 1...b6
- 2.Qf7#
- 1...Kb6!
- 1...Ka8
- 1.Bh1?
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b5
- 2.Qf2#
- 1...b6
- 2.Qf7#
- 1...Kb6!
- 1...Ka8
- 1.Bg2?
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b5
- 2.Qf2#
- 1...b6
- 2.Qf7#
- 1...Kb6!
- 1...Ka8
- 1.Bf3?
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b5
- 2.Qf2#
- 1...b6
- 2.Qf7#
- 1...Kb6!
- 1...Ka8
- 1.Bh2?
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b5
- 2.Qf2#
- 1...b6
- 2.Qf7#
- 1...Kb6!
- 1...Ka8
- 1.Bg3?
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b5
- 2.Qf2#
- 1...b6
- 2.Qf7#
- 1...Kb6!
- 1...Ka8
- 1.Bf4?
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b5
- 2.Qf2#
- 1...b6
- 2.Qf7#
- 1...Kb6!
- 1...Ka8
- 1.Bd6?
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b5
- 2.Qf2#
- 1...b6
- 2.Qf7#
- 1...Kb6!
- 1...Ka8
- 1.Bc7?
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b5
- 2.Qf2#
- 1...b6!
- 1...Ka8
- 1.Qb1?
- threat
- 2.Qxb7#
- 1...Ka8
- 2.Qxb7#
- 1...b5
- 2.Qg1#
- 1...b6!
- threat
- 1.Qb3?
- threat
- 2.Qxb7#
- 1...Ka8
- 2.Qxb7#
- 1...b6
- 2.Qf7#
- 1...b5!
- threat
- 1.Qd5?
- threat
- 2.Qxb7#
- 1...Ka8
- 2.Qxb7#
- 1...b5
- 2.Qb7#
- 2.Qd4#
- 2.Qc5#
- 1...b6
- 2.Qb7#
- 2.Qf7#
- 2.Qa8#
- 2.Qd7#
- 1...Kb6!
- threat
- 1.Qf7?
- threat
- 2.Qxb7#
- 1...Ka8
- 2.Qxb7#
- 1...Kb6!
- threat
- 1.Qb2?
- threat
- 2.Qxb7#
- 1...Ka8
- 2.Qxb7#
- 1...b5
- 2.Qf2#
- 1...b6!
- threat
- 1.Qf2+?
- 1...b6
- 2.Qf7#
- 1...Ka8!
- 1...b6
- 1.Qa3?
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b6
- 2.Qe7#
- 1...b5
- 2.Qc5#
- 1...Kb6!
- 1...Ka8
- 1.Qa4?
- 1...Ka8
- 2.Qxa6#
- 1...a5
- 2.Qxa5#
- 1...b6
- 2.Qd7#
- 1...b5
- 2.Qd4#
- 1...Kb6!
- 1...Ka8
- 1.Qa5?
- 1...Ka8
- 2.Qxa6#
- 1...b5
- 2.Qc7#
- 1...b6!
- 1...Ka8
- 1.Kd3?
- Keys
- 1.Kb4!
- 1...a5+
- 2.Qxa5#
- 1...Kb6
- 2.Qf2#
- 1...Ka8
- 2.Qxa6#
- 1...b5
- 2.Qf2#
- 1...b6
- 2.Qf7#
- 1...a5+
- 1.Kb4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);N_GUARD::QAB(A)
- P(c);OGATEB,SBLOCK::QAR(A)
- Tries
- Try
- K(B);P-FLIGHT
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);N_GUARD::QAB(A)
- P(c);OGATEB,SBLOCK::QAR(A)
- Refutation
- K(b);N_SPINP(a),S_FLIGHT
- Try
- B(C);
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);N_GUARD::QAB(A)
- P(c);OGATEB,SBLOCK::QAR(A)
- Refutation
- K(b);N_SPINP(a),S_FLIGHT
- Try
- B(C);
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);N_GUARD::QAB(A)
- P(c);OGATEB,SBLOCK::QAR(A)
- Refutation
- K(b);N_SPINP(a),S_FLIGHT
- Try
- B(C);
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);N_GUARD::QAB(A)
- P(c);OGATEB,SBLOCK::QAR(A)
- Refutation
- K(b);N_SPINP(a),S_FLIGHT
- Try
- B(D);
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);N_GUARD::QAB(A)
- P(c);OGATEB,SBLOCK::QAR(A)
- Refutation
- K(b);N_SPINP(a),S_FLIGHT
- Try
- B(D);
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);N_GUARD::QAB(A)
- P(c);OGATEB,SBLOCK::QAR(A)
- Refutation
- K(b);N_SPINP(a),S_FLIGHT
- Try
- B(D);
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);N_GUARD::QAB(A)
- P(c);OGATEB,SBLOCK::QAR(A)
- Refutation
- K(b);N_SPINP(a),S_FLIGHT
- Try
- B(D);
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);N_GUARD::QAB(A)
- P(c);OGATEB,SBLOCK::QAR(A)
- Refutation
- K(b);N_SPINP(a),S_FLIGHT
- Try
- B(D);
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);N_GUARD::QAB(A)
- Refutation
- P(c);
- Try
- Q(A);N_PINP(a)
- Threat
- QAR1(A),XP(c)
- Vars
- K(b);P-FLIGHT,P_SPINP(c)::QAB1(A),XP(c)
- P(c);N_GUARD::QAB(A)
- Refutation
- P(c);
- Try
- Q(A);N_PINP(a)
- Threat
- QAR1(A),XP(c)
- Vars
- K(b);P-FLIGHT,P_SPINP(c)::QAB1(A),XP(c)
- P(c);OGATEB,SBLOCK::QAR(A)
- Refutation
- P(c);
- Try
- Q(A);N_PINP(a)
- Threat
- QAR1(A),XP(c)
- Vars
- K(b);P-FLIGHT,P_SPINP(c)::QAB1(A),XP(c)
- Refutation
- K(b);S_FLIGHT
- Try
- Q(A);N_PINP(a),P_PINP(c)
- Threat
- QAR1(A),XP(c)
- Vars
- K(b);P-FLIGHT::QAB1(A),XP(c)
- Refutation
- K(b);N_SPINP(c),S_FLIGHT
- Try
- Q(A);N_PINP(a)
- Threat
- QAR1(A),XP(c)
- Vars
- K(b);P-FLIGHT,P_SPINP(c)::QAB1(A),XP(c)
- P(c);N_GUARD::QAB(A)
- Refutation
- P(c);
- Try
- Q(A);CHECK,N_PINP(a)
- Vars
- P(c);OGATEB,P_SPINP(c),SBLOCK::QAR(A)
- Refutation
- K(b);P-FLIGHT,P_SPINP(c)
- Try
- Q(A);
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);OGATEB,SBLOCK::QAR(A)
- P(c);N_GUARD::QAB(A)
- Refutation
- K(b);N_SPINP(a),S_FLIGHT
- Try
- Q(A);
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(a);OGATEB::QAR2(A),XP(a)
- P(c);OGATEB,SBLOCK::QAR(A)
- P(c);N_GUARD::QAB(A)
- Refutation
- K(b);N_SPINP(a),S_FLIGHT
- Try
- Q(A);
- Vars
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(c);OGATEB::QAR2(A)
- Refutation
- P(c);
- Try
- Actual
- K(B);S_FLIGHT
- Vars
- P(a);CHECK,OGATEB::QAR2(A),XP(a)
- K(b);N_SPINP(a),S_FLIGHT::QAB(A)
- K(b);P-FLIGHT::QAR2(A),XP(a)
- P(c);N_GUARD::QAB(A)
- P(c);OGATEB,SBLOCK::QAR(A)
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