MESON Chess Problem Database

Problem Display
PID: 17488 (bR3B2/q1b5/3n4/ppn5/PkN5/rp1p2Q1/1N3P1K/2R5 w - - 0 1)

Mansfield, Comins

2nd Prize, Caissa TT, 1947

bR3B2/q1b5/3n4/ppn5/PkN5/rp1p2Q1/1N3P1K/2R5

#2

9 + 11

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Sxa4
      • 2.Sxd3#
    • 1...Sce4
      • 2.Rxb5#
    • 1...Sa6
      • 2.Rxb5#
    • 1...Se6
      • 2.Rxb5#
    • 1...Sd7
      • 2.Rxb5#
    • 1...Sxc4
      • 2.Rxc4#
      • 2.Rxb5#
    • 1...Sde4
      • 2.Rxb5#
    • 1...Sf5
      • 2.Rxb5#
    • 1...Sf7
      • 2.Rxb5#
    • 1...Sc8
      • 2.Rxb5#
    • 1...Se8
      • 2.Rxb5#
    • 1...d2
      • 2.Qc3#
  • Tries
    • 1.Sxd3+?
      • 1...Kxa4
        • 2.Scb2#
      • 1...Sxd3!
    • 1.Qe5?
      • threat
        • 2.Qc3#
      • 1...Sxa4
        • 2.Sxd3#
        • 2.Rxb5#
        • 2.Qxb5#
      • 1...Sxc4
        • 2.Rxc4#
        • 2.Rxb5#
      • 1...Sce4
        • 2.Rxb5#
        • 2.Qxb5#
      • 1...Sa6
        • 2.Rxb5#
        • 2.Qxb5#
      • 1...Se6
        • 2.Rxb5#
        • 2.Qxb5#
      • 1...Scb7
        • 2.Qxb5#
      • 1...Sd7
        • 2.Rxb5#
        • 2.Qxb5#
      • 1...Sde4
        • 2.Rxb5#
      • 1...Sf5
        • 2.Rxb5#
      • 1...Sf7
        • 2.Rxb5#
      • 1...Sc8
        • 2.Rxb5#
      • 1...Se8
        • 2.Rxb5#
      • 1...Sdb7!
  • Keys
    • 1.Qf4!
      • threat
        • 2.Qd2#
      • 1...Sxa4
        • 2.Sxd3#
      • 1...Sxc4
        • 2.Rxc4#
        • 2.Rxb5#
      • 1...Sce4
        • 2.Rxb5#
      • 1...Sa6
        • 2.Rxb5#
      • 1...Se6
        • 2.Rxb5#
      • 1...Scb7
        • 2.Sb6#
      • 1...Sd7
        • 2.Rxb5#
      • 1...Sde4
        • 2.Rxb5#
      • 1...Sf5
        • 2.Rxb5#
      • 1...Sdb7
        • 2.Se5#
      • 1...Sf7
        • 2.Rxb5#
      • 1...Sc8
        • 2.Rxb5#
      • 1...Se8
        • 2.Rxb5#
      • 1...d2
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD,P_SPINS(h),SBLOCK,XP(F)::S(B),XP(c)
    • S(g);P_SPINS(h)::R1(H),XP(f)
    • S(h);N_GUARD,P_PINQ(E),P_SPINS(g)::R1(H),XP(f)
    • P(c);OGATE::QAB1(E)
  • Tries
    • Try
      • S(B);CHECK,XP(c)
      • Vars
        • K(d);N_SPINP(f),P-FLIGHT,XP(F)::S(G)
      • Refutation
        • S(g);P_SPINS(h),XS(B)
    • Try
      • Q(E);
      • Threat
        • QAB1(E)
      • Vars
        • S(g);N_SPINP(f),OGATE,P_SPINS(h)::QAR1(E),XP(f)
        • S(h);N_GUARD,P_PINQ(E),P_SPINS(g)::R1(H),XP(f)
      • Refutation
        • S(h);N_SPINP(f),P_PINQ(E),P_SPINS(g)
  • Actual
    • Q(E);
    • Threat
      • QAB(E)
    • Vars
      • S(g);N_GUARD,P_SPINS(h),SBLOCK,XP(F)::S(B),XP(c)
      • S(g);P_SPINS(h)::R1(H),XP(f)
      • S(g);N_GUARD,N_SPINP(f),P_SPINS(h),S_CUTB(k)::QAR(E)+S(G)
      • S(h);N_GUARD,P_PINQ(E),P_SPINS(g)::R1(H),XP(f)
      • S(h);N_GUARD,N_SPINP(f),P_PINQ(E),P_SPINS(g),S_CUTB(k)::QAR(E)+S(G)
      • P(c);::QAB(E),XP(c)
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