MESON Chess Problem Database

Problem Display
PID: 400 (2qR2Q1/1ppp4/prk5/1rN4K/B6n/8/8/2R5 w - - 0 1)

Mansfield, Comins

The Observer, 1942

(First published on Sun Nov 8 1942)

2qR2Q1/1ppp4/prk5/1rN4K/B6n/8/8/2R5

#2

6 + 9

3550 Complete Mansfield/II 1997
15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Kd6
      • 2.Qe6#
    • 1...Sf5
      • 2.Se4#
    • 1...d5
      • 2.Sb3#
      • 2.Sd3#
      • 2.Se4#
      • 2.Sxa6#
      • 2.Se6#
      • 2.Qxd5#
  • Tries
    • 1.Kxh4?
      • threat
        • 2.Se4#
      • 1...Kd6
        • 2.Qe6#
      • 1...Qxd8+!
    • 1.Kh6?
      • threat
        • 2.Se4#
      • 1...Kd6
        • 2.Qe6#
      • 1...Sf5+!
    • 1.Rd1?
      • threat
        • 2.Qd5#
      • 1...d5
        • 2.Qxd5#
      • 1...Kxc5!
  • Keys
    • 1.Kg4!
      • threat
        • 2.Se4#
      • 1...d5+
        • 2.Se6#
      • 1...d6+
        • 2.Sd7#
      • 1...Kd6
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);N_SPINR(b),P-FLIGHT,P_SPINP(h)::QAR1(F)
    • S(a);N_PINS(C)::R(A)+S(C)
  • Tries
    • Try
      • K(D);N_SPINS(C),P-FLIGHT,XS(a)
      • Threat
        • R(A)+S(C)
      • Vars
        • K(e);N_SPINR(b),P-FLIGHT,P_SPINP(h)::QAR1(F)
      • Refutation
        • Q(i);CHECK,XR(E)
    • Try
      • K(D);N_SPINS(C),P-FLIGHT
      • Threat
        • R(A)+S(C)
      • Vars
        • K(e);N_SPINR(b),P-FLIGHT,P_SPINP(h)::QAR1(F)
      • Refutation
        • S(a);CHECK
    • Try
      • R(A);
      • Threat
        • QAB1(F)
      • Vars
        • P(h);N_PINS(C)::QAB1(F),XP(h)
      • Refutation
        • K(e);N_SPINR(b),P-FLIGHT,XS(C)
  • Actual
    • K(D);N_SPINS(C),S_FLIGHT
    • Threat
      • R(A)+S(C)
    • Vars
      • P(h);CHECK::R(A)+S(C)
      • P(h);CHECK,SBLOCK::R(A)+S(C)
      • K(e);N_SPINR(b),P-FLIGHT,P_SPINP(h)::QAR1(F)
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