MESON Chess Problem Database

Problem Display
PID: 273207 (2Q2bK1/8/2Pr1p2/3P1NnR/4kP2/N2bPpqP/1B1R1P2/8 w - - 0 1)

Ellison, Wallace D

The Problemist, 1931

2Q2bK1/8/2Pr1p2/3P1NnR/4kP2/N2bPpqP/1B1R1P2/8

#2

13 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Sxg3#
    • 1...Bb1
      • 2.Sxg3#
      • 2.Rd4#
    • 1...Bf1
      • 2.Sxg3#
      • 2.Rd4#
    • 1...Bc2
      • 2.Sxg3#
      • 2.Rd4#
    • 1...Be2
      • 2.Sxg3#
      • 2.Rd4#
    • 1...Bc4
      • 2.Sxg3#
      • 2.Rd4#
    • 1...Bb5
      • 2.Sxg3#
      • 2.Rd4#
    • 1...Ba6
      • 2.Sxg3#
      • 2.Rd4#
    • 1...Sxh3+
      • 2.Sxg3#
    • 1...Se6+
      • 2.Sxg3#
    • 1...Sf7+
      • 2.Sxg3#
    • 1...Sh7+
      • 2.Sxg3#
  • Tries
    • 1.Qe6+?
      • 1...Sxe6+
        • 2.Sxg3#
      • 1...Rxe6!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qxd3#
      • 1...Sxh3+
        • 2.Sxg3#
      • 1...Se6+
        • 2.Sxg3#
      • 1...Sf7+
        • 2.Sxg3#
      • 1...Sh7+
        • 2.Sxg3#
      • 1...Kxd5
        • 2.Qc4#
      • 1...Kxf5
        • 2.Qxd3#
      • 1...Rxd5
        • 2.Sxg3#
      • 1...Bxa6
        • 2.Sxg3#
      • 1...Bb1
        • 2.Sxg3#
      • 1...Bf1
        • 2.Sxg3#
      • 1...Bc2
        • 2.Sxg3#
      • 1...Be2
        • 2.Sxg3#
      • 1...Bc4
        • 2.Sxg3#
      • 1...Bb5
        • 2.Sxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK,XP(H)::S(I),XQ(c)
    • S(e);CHECK,XP(F)::S(I),XQ(c)
    • S(e);CHECK::S(I),XQ(c)
  • Tries
    • Try
      • Q(L);CHECK
      • Vars
        • S(e);CHECK,XQ(L)::S(I),XQ(c)
      • Refutation
        • R(f);XQ(L)
  • Actual
    • Q(L);
    • Threat
      • QAB1(L),XB(a)
    • Vars
      • S(e);CHECK,XP(F)::S(I),XQ(c)
      • S(e);CHECK::S(I),XQ(c)
      • K(d);N_GUARD,P_SPINB(a),S_FLIGHT,XP(H)::QAB1(L)
      • K(d);P_SPINS(e),S_FLIGHT,XS(I)::QAB(L),XB(a)
      • R(f);SBLOCK,XP(H)::S(I),XQ(c)
      • B(a);XQ(L)::S(I),XQ(c)
      • B(a);::S(I),XQ(c)
      • B(a);P_PINP(H)::S(I),XQ(c)
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