MESON Chess Problem Database

Problem Display
PID: 453 (2K1R3/1B1N4/2N1PB1p/3b4/R1P1k3/6QP/8/2r5 w - - 0 1)

Mansfield, Comins

The Observer, 1955

(First published on Sun May 15 1955)

2K1R3/1B1N4/2N1PB1p/3b4/R1P1k3/6QP/8/2r5

#2

11 + 4

3550 Complete Mansfield/II 1997
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qg4#
    • 1...Bxc4
      • 2.Se7#
    • 1...Bxe6
      • 2.Sd4#
  • Tries
    • 1.Se7?
      • threat
        • 2.Sc5#
        • 2.Bxd5#
      • 1...Rxc4+
        • 2.Sc5#
        • 2.Rxc4#
      • 1...Rd1
        • 2.Sc5#
      • 1...Bc6
        • 2.Sc5#
        • 2.Bxc6#
      • 1...Bxb7+!
    • 1.Ra3?
      • threat
        • 2.Qe5#
        • 2.Qf3#
        • 2.Qg4#
      • 1...Kf5
        • 2.Qg4#
      • 1...Bxc4
        • 2.Qe5#
        • 2.Qf3#
      • 1...Rf1
        • 2.Qe5#
      • 1...Rg1
        • 2.Qe5#
        • 2.Qf3#
      • 1...h5
        • 2.Qe5#
        • 2.Qf3#
      • 1...Rc3!
    • 1.Qe3+?
      • 1...Kf5
        • 2.Se7#
      • 1...Kxe3!
    • 1.cxd5+?
      • 1...Kxd5
        • 2.Rd4#
        • 2.Qe5#
        • 2.Qd3#
      • 1...Kf5
        • 2.Rf4#
        • 2.Qd3#
        • 2.Qg4#
      • 1...Rc4!
    • 1.c5+?
      • 1...Kf5
        • 2.Rf4#
        • 2.Qg4#
      • 1...Bc4
        • 2.Se7#
      • 1...Rc4!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Sc5#
      • 1...Kd3
        • 2.Sc5#
      • 1...Bxc4
        • 2.Sce5#
      • 1...Bxe6
        • 2.Sb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB1(A)
    • B(c);P_SPINB(c),XP(D)::B(H)+S(E)
    • B(c);P_PINS(I),P_SPINB(c),XP(F)::B(H)+S(E)
  • Tries
    • Try
      • S(E);P_PINB(c),P_SPINP(D)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);N_PINP(D)::S(I)
      • Refutation
        • B(c);CHECK,N_SPINB(c),XB(H)
    • Try
      • R(C);
      • Threat
        • DUALS(3)
      • Vars
        • K(b);S_FLIGHT::QAB1(A)
        • R(a);::QAR1(A)
      • Refutation
        • R(a);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT::S(E)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • P(D);CHECK,P_SPINS(E),XB(c)
      • Refutation
        • R(a);P_SPINR(a)
    • Try
      • P(D);CHECK
      • Vars
        • B(c);P_SPINB(c),S_CUTR(a)::B(H)+S(E)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • Q(A);
    • Threat
      • S(I)
    • Vars
      • K(b);S_FLIGHT::S(I)
      • B(c);P_SPINB(c),XP(D)::B(H)+S(E)
      • B(c);P_PINS(I),P_SPINB(c),XP(F)::B(H)+S(E)
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