MESON Chess Problem Database

Problem Display
PID: 149062 (7k/bP1p2qr/K2N2RR/8/8/6Q1/8/8 w - - 0 1)

Betts, Frederick Charles

Good Companions (May Meredith Ty.), 1918

7k/bP1p2qr/K2N2RR/8/8/6Q1/8/8

#2

6 + 5

15351 SCPF/BCPS Black Books 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qb2
      • 2.Sf7#
      • 2.Rg8#
    • 1...Qc3
      • 2.Sf7#
      • 2.Rg8#
    • 1...Qd4
      • 2.Sf7#
      • 2.Rg8#
    • 1...Qe5
      • 2.Sf7#
      • 2.Rg8#
      • 2.Qxe5#
    • 1...Qf6
      • 2.Rg8#
    • 1...Qxh6
      • 2.Rg8#
    • 1...Qe7
      • 2.Rg8#
    • 1...Qf7
      • 2.Sxf7#
    • 1...Qg8
      • 2.Rxg8#
  • Tries
    • 1.Qc3?
      • threat
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qc8#
      • 1...Qxc3
        • 2.Sf7#
      • 1...Qd4
        • 2.Sf7#
        • 2.Qc8#
      • 1...Qe5
        • 2.Sf7#
        • 2.Qxe5#
      • 1...Qf6
        • 2.Qxf6#
      • 1...Bd4!
    • 1.b8Q+?
      • 1...Qf8
        • 2.Sf7#
        • 2.Qe5#
        • 2.Qxf8#
      • 1...Qg8
        • 2.Sf7#
        • 2.Rxg8#
        • 2.Qe5#
        • 2.Qxg8#
      • 1...Bxb8!
    • 1.b8R+?
      • 1...Qf8
        • 2.Sf7#
        • 2.Rxf8#
        • 2.Qe5#
      • 1...Qg8
        • 2.Sf7#
        • 2.Rgxg8#
        • 2.Rbxg8#
        • 2.Qe5#
      • 1...Bxb8!
  • Keys
    • 1.Qe5!
      • threat
        • 2.Qxg7#
      • 1...Kg8
        • 2.Qe8#
      • 1...Qxe5
        • 2.Sf7#
      • 1...Qf6
        • 2.Qxf6#
      • 1...Bd4
        • 2.b8Q#
        • 2.b8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • Q(c);OGATE,P_PINS(C)::R1(D)
    • Q(c);N_SPINR(d),OGATE,XR(E)::R1(D)
    • Q(c);OGATE::R1(D)
    • Q(c);N_GUARD::S(C),XQ(c)
    • Q(c);OGATE::R1(D),XQ(c)
  • Tries
    • Try
      • Q(A);P_PINQ(c)
      • Threat
        • QAB1(A),XQ(c)
      • Vars
        • K(e);N_SPINR(d),P-FLIGHT::QAR(A)
        • Q(c);N_SPINQ(c),XQ(A)::S(C)
        • Q(c);OGATEB,P_PINS(C)::QAB(A),XQ(c)
      • Refutation
        • B(a);N_SPINQ(c)
    • Try
      • P(F);CHECK
      • Refutation
        • B(a);XQ(F)
    • Try
      • P(F);CHECK
      • Refutation
        • B(a);XR(F)
  • Actual
    • Q(A);P_PINQ(c)
    • Threat
      • QAB1(A),XQ(c)
    • Vars
      • K(e);N_SPINR(d),P-FLIGHT::QAR2(A)
      • Q(c);N_SPINQ(c),XQ(A)::S(C)
      • Q(c);OGATEB,P_PINS(C)::QAB(A),XQ(c)
      • B(a);N_GUARD::P=Q
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