MESON Chess Problem Database

Problem Display
PID: 11905 (3R4/Q1p5/1r1Bb2K/1n6/1P1kB1Rp/1P5r/4P3/3N2q1 w - - 0 1)

Haring, Jacobus

4th HM., KeyStip 09. Ty., 1973

3R4/Q1p5/1r1Bb2K/1n6/1P1kB1Rp/1P5r/4P3/3N2q1

#2

10 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Bxb3
      • 2.Bg2#
    • 1...Bc4
      • 2.Bg2#
    • 1...Bf7
      • 2.Bg2#
    • 1...Bg8
      • 2.Bg2#
    • 1...cxd6
      • 2.Qg7#
    • 1...c5
      • 2.Qg7#
    • 1...c6
      • 2.Qg7#
  • Tries
    • 1.Bxc7+?
      • 1...Bd5+
        • 2.Qxb6#
      • 1...Bd7+
        • 2.Qxb6#
      • 1...Sd6!
    • 1.Be7+?
      • 1...Bd5+
        • 2.Bf6#
      • 1...Bd7+
        • 2.Bf6#
      • 1...Sd6
        • 2.Bf6#
      • 1...Ke5!
    • 1.Qxb6+?
      • 1...c5
        • 2.Qxc5#
      • 1...cxb6!
  • Keys
    • 1.Bg3+!
      • 1...Bd5+
        • 2.Bg6#
      • 1...Bd7+
        • 2.Bc6#
      • 1...Sd6
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • B(g);N_GUARD,P_PINB(G),XP(C)::R(F)+B(E)
    • B(g);N_GUARD,P_PINB(G)::R(F)+B(E)
    • P(h);OGATE,P_SPINP(h),XB(G)::QAB(I)
    • P(h);N_SPINR(f),OGATE::QAB(I)
    • P(h);OGATE::QAB(I)
  • Tries
    • Try
      • B(G);CHECK,XP(h)
      • Vars
        • B(g);CHECK,P_SPINB(g)::QAB(I),XR(f)
      • Refutation
        • S(e);P_SPINS(e)
    • Try
      • B(G);CHECK
      • Vars
        • B(g);CHECK,P_SPINB(g)::B(G)
        • S(e);P_SPINS(e)::B(G)
      • Refutation
        • K(c);N_SPINR(f),S_FLIGHT
    • Try
      • Q(I);CHECK,XR(f)
      • Vars
        • P(h);P_SPINP(h)::QAB1(I),XP(h)
      • Refutation
        • P(h);XQ(I)
  • Actual
    • B(G);CHECK
    • Vars
      • B(g);CHECK,P_SPINB(g)::R(F)+B(E)
      • S(e);P_SPINS(e)::QAB(I)
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