MESON Chess Problem Database

Problem Display
PID: 229802 (4nR2/2p1k3/1P1RP2K/8/8/2Qp4/8/8 w - - 0 1)

Head, Arthur James

Southend Times, 1937

(First published on Wed May 12 1937)

4nR2/2p1k3/1P1RP2K/8/8/2Qp4/8/8

#2

6 + 4

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd6
      • 2.Qf6#
  • Tries
    • 1.Rd7+?
      • 1...Kxf8
        • 2.Qh8#
      • 1...Kxe6!
    • 1.Qxc7+?
      • 1...Kxf8
        • 2.Qf7#
      • 1...Sxc7!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Rfxe8#
      • 1...Kxe6
        • 2.Qe1#
      • 1...Kxd8
        • 2.Qxc7#
      • 1...Kxf8
        • 2.Qg7#
      • 1...Sd6
        • 2.Qf6#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sg7
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD,SBLOCK,XR(C)::QAB1(A)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(F)::QAR2(A)
      • Refutation
        • K(c);P-FLIGHT,XP(D)
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • K(c);OGATE,S_FLIGHT,XR(F)::QAR1(A)
      • Refutation
        • S(d);XQ(A)
  • Actual
    • R(C);
    • Threat
      • R1(F),XS(d)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XP(D)::QAR(A)
      • K(c);P_SPINS(d),S_FLIGHT,XR(C)::QAB1(A),XP(b)
      • K(c);P_SPINS(d),S_FLIGHT,XR(F)::QAB1(A)
      • S(d);N_GUARD::QAB1(A)
      • S(d);N_GUARD::QAB1(A),XS(d)
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