MESON Chess Problem Database

Problem Display
PID: 11973 (4Q1B1/8/nBnpN3/2P3Rb/prkN3K/P1p5/2P5/1R6 w - - 0 1)

Coombe-Tennant, Joseph

The Problemist, 1973

4Q1B1/8/nBnpN3/2P3Rb/prkN3K/P1p5/2P5/1R6

#2

11 + 8

SOLUTION

  • SOUND
  • Tries
    • 1.Rxb4+?
      • 1...Scxb4
        • 2.Qb5#
      • 1...Saxb4!
    • 1.Qxc6?
      • threat
        • 2.Qd5#
      • 1...Sc7
        • 2.Rxb4#
        • 2.cxd6#
      • 1...d5
        • 2.Qxd5#
      • 1...Bf3!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sxd6#
      • 1...Kb5+
        • 2.Sed4#
      • 1...Kd5+
        • 2.Sf4#
      • 1...dxc5
        • 2.Sd6#
      • 1...Se5
        • 2.Se3#
      • 1...d5
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(A);CHECK,XR(c)
      • Vars
        • S(g);OGATE,XR(A)::QAB1(J)
      • Refutation
        • S(f);XR(A)
    • Try
      • Q(J);XS(g)
      • Threat
        • QAB1(J)
      • Vars
        • P(h);::QAB1(J),XP(h)
      • Refutation
        • B(e);
  • Actual
    • S(D);
    • Threat
      • S(D),XP(h)
    • Vars
      • K(d);CHECK,P_SPINR(c),P_SPINS(g),S_FLIGHT::S(I)
      • K(d);CHECK,S_FLIGHT::B(K)+S(I),DCHECK
      • P(h);XP(F)::S(D)
      • S(g);::S(D)
      • P(h);::S(D)
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