MESON Chess Problem Database

Problem Display
PID: 186624 (1BbQr3/1pq1r3/1p1N1p2/3NRP2/1Ppk2P1/3p2K1/3P4/8 w - - 0 1)

Benthall, Paul

Chess, 1959

1BbQr3/1pq1r3/1p1N1p2/3NRP2/1Ppk2P1/3p2K1/3P4/8

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd8
      • 2.Sb5#
  • Tries
    • 1.Sxf6?
      • threat
        • 2.Rd5#
      • 1...Qxd6
        • 2.Qxd6#
      • 1...Rxe5
        • 2.Sb5#
      • 1...Qc5
        • 2.Sb5#
      • 1...Qc6
        • 2.Sb5#
      • 1...Be6
        • 2.Re4#
      • 1...Kxe5!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Rd5#
      • 1...Kxe5
        • 2.Sxc4#
      • 1...Qxd6
        • 2.Qxd6#
      • 1...Rxe5
        • 2.Sdb5#
      • 1...fxe5
        • 2.Sdb5#
      • 1...Qc5
        • 2.Sdb5#
      • 1...Qc6
        • 2.Sdb5#
      • 1...Be6
        • 2.Re4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • Q(g);XQ(J)::S(H)
  • Tries
    • Try
      • S(E);XP(e)
      • Threat
        • R1(F)
      • Vars
        • Q(g);OGATE,P_PINR(F),P_SPINQ(g),XS(H)::QAR2(J),XQ(g)
        • R(h);SBLOCK,XR(F)::QAR(J)+S(H),DCHECK
        • Q(g);::QAR(J)+S(H),DCHECK
        • B(i);S_CUTR(h)::R1(F)
      • Refutation
        • K(c);S_FLIGHT,XR(F)
  • Actual
    • S(E);
    • Threat
      • R1(F)
    • Vars
      • K(c);S_FLIGHT,XR(F)::S(H),XP(b)
      • Q(g);OGATE,P_PINR(F),P_SPINQ(g),XS(H)::QAR2(J),XQ(g)
      • R(h);SBLOCK,XR(F)::QAR(J)+S(H),DCHECK
      • P(e);SBLOCK,XR(F)::QAR(J)+S(H),DCHECK
      • Q(g);::QAR(J)+S(H),DCHECK
      • B(i);S_CUTR(h)::R1(F)
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