MESON Chess Problem Database

Problem Display
PID: 16877 (8/8/n7/3B1pr1/5kp1/R3N2n/6Q1/B1bK4 w - - 0 1)

Mansfield, Comins

Chess, 1944

8/8/n7/3B1pr1/5kp1/R3N2n/6Q1/B1bK4

#2

6 + 7

3550 Complete Mansfield/II 1997
56 The Problemist 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2+
      • 2.Qxf2#
    • 1...g3
      • 2.Qf3#
  • Tries
    • 1.Ra4+?
      • 1...Kxe3
        • 2.Qe2#
        • 2.Qg3#
      • 1...Sb4!
    • 1.Qf1+?
      • 1...Sf2+
        • 2.Qxf2#
      • 1...Kg3!
  • Keys
    • 1.Qd2!
      • threat
        • 2.Sg2#
      • 1...Sf2+
        • 2.Qxf2#
      • 1...Kg3
        • 2.Sxf5#
      • 1...Bxa3
        • 2.Sf1#
      • 1...Bb2
        • 2.Sc4#
      • 1...g3
        • 2.Qd4#

There are these versions: 186871

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(b);CHECK,N_GUARD::QAR2(C),XS(b)
    • P(d);N_GUARD::QAR1(C)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • S(g);P_SPINS(g)
    • Try
      • Q(C);CHECK
      • Vars
        • S(b);CHECK,N_GUARD,P_SPINS(b)::QAR2(C),XS(b)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(C);
    • Threat
      • QAB(C)+S(E),DCHECK
    • Vars
      • S(b);CHECK,N_GUARD::QAR2(C),XS(b)
      • K(c);S_FLIGHT::R(D)+S(E),DCHECK,XP(e)
      • B(a);N_GUARD,XR(D)::QAB(C)+S(E)
      • B(a);N_GUARD::QAB(C)+S(E)
      • P(d);SBLOCK::QAR2(C)
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