MESON Chess Problem Database

Problem Display
PID: 786 (1b1N2Q1/1n6/8/3R1p1K/4k3/1P1p1n2/3p2N1/8 w - - 0 1)

Driver, John Edward

3rd Prize, British Chess Magazine, 1961

1b1N2Q1/1n6/8/3R1p1K/4k3/1P1p1n2/3p2N1/8

#2

6 + 7

3174 The Two-move Chess Problem Tradition and Development 1966
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Rb5?
      • threat
        • 2.Qd5#
      • 1...Kd4
        • 2.Qc4#
      • 1...Sc5!
    • 1.Rc5?
      • threat
        • 2.Qd5#
      • 1...Kd4
        • 2.Qc4#
        • 2.Qd5#
      • 1...Sxc5!
    • 1.Rxf5?
      • threat
        • 2.Qd5#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kxf5
        • 2.Qe6#
      • 1...Se5
        • 2.Rf4#
      • 1...Be5!
  • Keys
    • 1.Rxd3!
      • threat
        • 2.Qd5#
      • 1...Kxd3
        • 2.Qc4#
      • 1...Ke5
        • 2.Qe6#
      • 1...Sd4
        • 2.Re3#

This anticipates 179730(1979)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Threat
        • QAB1(F)
      • Vars
        • K(d);P-FLIGHT::QAR1(F)
      • Refutation
        • S(f);
    • Try
      • R(C);
      • Threat
        • QAB1(F)
      • Refutation
        • S(f);XR(C)
    • Try
      • R(C);XP(e)
      • Threat
        • QAB1(F)
      • Vars
        • K(d);P-FLIGHT::QAR1(F)
        • K(d);S_FLIGHT,XR(C)::QAB1(F)
        • S(c);SBLOCK,S_CUTB(g)::R1(C)
      • Refutation
        • B(g);
  • Actual
    • R(C);XP(b)
    • Threat
      • QAB1(F)
    • Vars
      • K(d);S_FLIGHT,XR(C)::QAB1(F)
      • K(d);P-FLIGHT::QAR1(F)
      • S(c);SBLOCK::R1(C)
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