MESON Chess Problem Database

Problem Display
PID: 152244 (5B2/4p3/1P6/3pk1K1/R2N4/8/Q3P1b1/8 w - - 0 1)

Rayner, James

Pen & Pencil, 1888

(First published on Sat Jul 7 1888)

5B2/4p3/1P6/3pk1K1/R2N4/8/Q3P1b1/8

#2

7 + 4

15239 Valois Notebooks 2014

SOLUTION

  • SOUND
  • Sets
    • 1...e6
      • 2.Sc6#
  • Tries
    • 1.Qd2?
      • threat
        • 2.Qf4#
      • 1...Ke4
        • 2.Qf4#
      • 1...Kd6!
    • 1.Qa3?
      • threat
        • 2.Qxe7#
      • 1...Ke4
        • 2.Qxe7#
      • 1...e6
        • 2.Sc6#
      • 1...Bh3!
  • Keys
    • 1.e4!
      • threat
        • 2.Qxd5#
      • 1...Kxe4
        • 2.Qe2#
      • 1...Kd6
        • 2.Qxd5#
      • 1...Bxe4
        • 2.Qh2#
      • 1...dxe4
        • 2.Qe6#
      • 1...e6
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • P(d);SBLOCK::S(D)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(c);P-FLIGHT::QAR1(A)
      • Refutation
        • K(c);P_SPINP(d),S_FLIGHT
    • Try
      • Q(A);
      • Threat
        • QAR2(A),XP(d)
      • Vars
        • K(c);P-FLIGHT::QAR(A),XP(d)
        • P(d);SBLOCK::S(D)
      • Refutation
        • B(a);
  • Actual
    • P(B);
    • Threat
      • QAR1(A),XP(b)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XP(B)::QAR2(A)
      • K(c);P_SPINP(d),S_FLIGHT::QAR1(A),XP(b)
      • B(a);OGATE,SBLOCK,XP(B)::QAB(A)
      • P(b);OGATE,SBLOCK,XP(B)::QAR1(A)
      • P(d);SBLOCK::S(D)
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