Meson Chess Problem Database

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Problem Display

PID: 18572 (2B5/8/2p5/2N5/2PB4/Q1K1bkP1/3PR2P/4R3 w - - 0 1)

Mansfield, Comins

The Problemist, 1956

11 + 3

3550	Complete Mansfield/II	1997

SOLUTION

SOUND
Sets
- 1...Bxd2+
  - 2.Kxd2#
- 1...Bf2
  - 2.Rxf2#
- 1...Bxd4+
  - 2.Kxd4#
- 1...Bf4
  - 2.Rf2#
- 1...Bg5
  - 2.Rf2#
- 1...Bh6
  - 2.Rf2#
Tries
- 1.Kd3?
  - 1...Bxd2
    - 2.Kxd2#
    - 2.Rf1#
    - 2.Rf2#
  - 1...Bxd4
    - 2.Kxd4#
  - 1...Bf2
    - 2.Rxf2#
  - 1...Bf4
    - 2.Rf1#
    - 2.Rf2#
  - 1...Bg5
    - 2.Rf1#
    - 2.Rf2#
  - 1...Bh6
    - 2.Rf1#
    - 2.Rf2#
  - 1...Bg1!
- 1.Sa4?
  - 1...Bxd2+
    - 2.Kxd2#
  - 1...Bxd4+
    - 2.Kxd4#
  - 1...Ke4
    - 2.Rxe3#
  - 1...Bg1
    - 2.Qf8#
  - 1...Bf2
    - 2.Rxf2#
  - 1...Bf4
    - 2.Rf2#
  - 1...Bg5
    - 2.Rf2#
  - 1...Bh6
    - 2.Rf2#
  - 1...c5!
- 1.Se4?
  - 1...Bxd2+
    - 2.Kxd2#
    - 2.Sxd2#
  - 1...Bxd4+
    - 2.Kxd4#
  - 1...Kxe4
    - 2.Rxe3#
  - 1...Bg1
    - 2.Sg5#
    - 2.Qf8#
  - 1...Bf2
    - 2.Rxf2#
  - 1...Bf4
    - 2.Rf2#
  - 1...Bg5
    - 2.Sxg5#
    - 2.Rf2#
  - 1...Bh6
    - 2.Rf2#
  - 1...c5!
- 1.Sa6?
  - 1...Bxd2+
    - 2.Kxd2#
  - 1...Bxd4+
    - 2.Kxd4#
  - 1...Ke4
    - 2.Rxe3#
  - 1...Bg1
    - 2.Qf8#
  - 1...Bf2
    - 2.Rxf2#
  - 1...Bf4
    - 2.Rf2#
  - 1...Bg5
    - 2.Rf2#
  - 1...Bh6
    - 2.Rf2#
  - 1...c5!
- 1.Sb7?
  - 1...Bxd2+
    - 2.Kxd2#
  - 1...Bxd4+
    - 2.Kxd4#
  - 1...Ke4
    - 2.Rxe3#
  - 1...Bg1
    - 2.Qf8#
  - 1...Bf2
    - 2.Rxf2#
  - 1...Bf4
    - 2.Rf2#
  - 1...Bg5
    - 2.Rf2#
  - 1...Bh6
    - 2.Rf2#
  - 1...c5!
- 1.Bh3?
  - 1...Bxd2+
    - 2.Kxd2#
  - 1...Bxd4+
    - 2.Kxd4#
  - 1...Bf2
    - 2.Rxf2#
  - 1...Bf4
    - 2.Rf2#
  - 1...Bg5
    - 2.Rf2#
  - 1...Bh6
    - 2.Rf2#
  - 1...Bg1!
- 1.Bf5?
  - 1...Bxd2+
    - 2.Kxd2#
  - 1...Bxd4+
    - 2.Kxd4#
  - 1...Bf2
    - 2.Rxf2#
  - 1...Bf4
    - 2.Rf2#
  - 1...Bg5
    - 2.Rf2#
  - 1...Bh6
    - 2.Rf2#
  - 1...Bg1!
- 1.Be6?
  - 1...Bxd2+
    - 2.Kxd2#
  - 1...Bxd4+
    - 2.Kxd4#
  - 1...Bf2
    - 2.Rxf2#
  - 1...Bf4
    - 2.Rf2#
  - 1...Bg5
    - 2.Rf2#
  - 1...Bh6
    - 2.Rf2#
  - 1...Bg1!
- 1.Bd7?
  - 1...Bxd2+
    - 2.Kxd2#
  - 1...Bxd4+
    - 2.Kxd4#
  - 1...Bf2
    - 2.Rxf2#
  - 1...Bf4
    - 2.Rf2#
  - 1...Bg5
    - 2.Rf2#
  - 1...Bh6
    - 2.Rf2#
  - 1...Bg1!
- 1.Rf1+?
  - 1...Bf2
    - 2.Rfxf2#
    - 2.Rexf2#
  - 1...Kxe2!
- 1.Qb3?
  - 1...Bxd2+
    - 2.Kxd2#
  - 1...Bxd4+
    - 2.Kxd4#
  - 1...Bf2
    - 2.Rxf2#
  - 1...Bf4
    - 2.Rf2#
  - 1...Bg5
    - 2.Rf2#
  - 1...Bh6
    - 2.Rf2#
  - 1...Bg1!
Keys
- 1.Sb3!
  - 1...Bxd2+
    - 2.Sxd2#
  - 1...Bxd4+
    - 2.Sxd4#
  - 1...Ke4
    - 2.Rxe3#
  - 1...Bg1
    - 2.Qf8#
  - 1...Bf2
    - 2.Rxf2#
  - 1...Bf4
    - 2.Rf2#
  - 1...Bg5
    - 2.Rf2#
  - 1...Bh6
    - 2.Rf2#
  - 1...c5
    - 2.Qa8#

FEATURES

Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 0
Sets
- B(a);CHECK,XP(B)::QAR(E)+K(F),XB(a)
- B(a);N_GUARD::R1(C),XB(a)
- B(a);CHECK,XB(I)::QAR(E)+K(F),XB(a)
- B(a);N_GUARD::R1(C)
Tries
- Try
  - K(F);P-FLIGHT
  - Vars
    - B(a);XB(I)::QAR(E)+K(F),XB(a)
    - B(a);N_GUARD::R1(C),XB(a)
  - Refutation
    - B(a);
- Try
  - S(J);
  - Vars
    - B(a);CHECK,XP(B)::QAR(E)+K(F),XB(a)
    - B(a);CHECK,XB(I)::QAR(E)+K(F),XB(a)
    - K(b);P_SPINB(a),S_FLIGHT::R1(C),XB(a)
    - B(a);N_GUARD::QAR(E)
    - B(a);N_GUARD::R1(C),XB(a)
    - B(a);N_GUARD::R1(C)
  - Refutation
    - P(c);
- Try
  - S(J);
  - Vars
    - B(a);CHECK,XB(I)::QAR(E)+K(F),XB(a)
    - K(b);P_SPINB(a),S_FLIGHT,XS(J)::R1(C),XB(a)
    - B(a);N_GUARD::R1(C),XB(a)
    - B(a);N_GUARD::R1(C)
  - Refutation
    - P(c);
- Try
  - S(J);
  - Vars
    - B(a);CHECK,XP(B)::QAR(E)+K(F),XB(a)
    - B(a);CHECK,XB(I)::QAR(E)+K(F),XB(a)
    - K(b);P_SPINB(a),S_FLIGHT::R1(C),XB(a)
    - B(a);N_GUARD::QAR(E)
    - B(a);N_GUARD::R1(C),XB(a)
    - B(a);N_GUARD::R1(C)
  - Refutation
    - P(c);
- Try
  - S(J);
  - Vars
    - B(a);CHECK,XP(B)::QAR(E)+K(F),XB(a)
    - B(a);CHECK,XB(I)::QAR(E)+K(F),XB(a)
    - K(b);P_SPINB(a),S_FLIGHT::R1(C),XB(a)
    - B(a);N_GUARD::QAR(E)
    - B(a);N_GUARD::R1(C),XB(a)
    - B(a);N_GUARD::R1(C)
  - Refutation
    - P(c);
- Try
  - B(K);
  - Vars
    - B(a);CHECK,XP(B)::QAR(E)+K(F),XB(a)
    - B(a);CHECK,XB(I)::QAR(E)+K(F),XB(a)
    - B(a);N_GUARD::R1(C),XB(a)
    - B(a);N_GUARD::R1(C)
  - Refutation
    - B(a);
- Try
  - B(K);
  - Vars
    - B(a);CHECK,XP(B)::QAR(E)+K(F),XB(a)
    - B(a);CHECK,XB(I)::QAR(E)+K(F),XB(a)
    - B(a);N_GUARD::R1(C),XB(a)
    - B(a);N_GUARD::R1(C)
  - Refutation
    - B(a);
- Try
  - B(K);
  - Vars
    - B(a);CHECK,XP(B)::QAR(E)+K(F),XB(a)
    - B(a);CHECK,XB(I)::QAR(E)+K(F),XB(a)
    - B(a);N_GUARD::R1(C),XB(a)
    - B(a);N_GUARD::R1(C)
  - Refutation
    - B(a);
- Try
  - B(K);
  - Vars
    - B(a);CHECK,XP(B)::QAR(E)+K(F),XB(a)
    - B(a);CHECK,XB(I)::QAR(E)+K(F),XB(a)
    - B(a);N_GUARD::R1(C),XB(a)
    - B(a);N_GUARD::R1(C)
  - Refutation
    - B(a);
- Try
  - R(A);CHECK
  - Refutation
    - K(b);S_FLIGHT,XR(C)
- Try
  - Q(E);
  - Vars
    - B(a);CHECK,XP(B)::QAR(E)+K(F),XB(a)
    - B(a);CHECK,XB(I)::QAR(E)+K(F),XB(a)
    - B(a);N_GUARD::R1(C),XB(a)
    - B(a);N_GUARD::R1(C)
  - Refutation
    - B(a);
Actual
- S(J);
- Vars
  - B(a);CHECK,XP(B)::S(J),XB(a)
  - B(a);CHECK,XB(I)::S(J),XB(a)
  - K(b);P_SPINB(a),S_FLIGHT::R1(C),XB(a)
  - B(a);N_GUARD::QAR(E)
  - B(a);N_GUARD::R1(C),XB(a)
  - B(a);N_GUARD::R1(C)
  - P(c);OGATEB::QAB(E)

MESON Chess Problem Database

Problem Display

PID: 18572 (2B5/8/2p5/2N5/2PB4/Q1K1bkP1/3PR2P/4R3 w - - 0 1)

SOLUTION

FEATURES