MESON Chess Problem Database

Problem Display
PID: 133842 (1Q3b2/5N2/3r4/8/r4k1N/p3Rp1P/2bPPK2/1nB5 w - - 0 1)

Stevenson, Edward

The Field, 1962

(First published on Thu Apr 26 1962)

1Q3b2/5N2/3r4/8/r4k1N/p3Rp1P/2bPPK2/1nB5

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Rxf3#
    • 1...Bh6
      • 2.Qxd6#
  • Tries
    • 1.Re6?
      • threat
        • 2.e3#
      • 1...Re4
        • 2.Rf6#
      • 1...fxe2!
    • 1.d3?
      • threat
        • 2.Rxf3#
        • 2.Re4#
      • 1...fxe2
        • 2.Rf3#
        • 2.Re4#
      • 1...Re4
        • 2.Rxf3#
        • 2.Rxe4#
      • 1...Sd2
        • 2.Rxf3#
      • 1...Bxd3!
  • Keys
    • 1.Re5!
      • threat
        • 2.e3#
      • 1...Rxd2
        • 2.Re7#
      • 1...fxe2
        • 2.Sg2#
      • 1...Re4
        • 2.Rf5#
      • 1...Rd3
        • 2.Sg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(e);SBLOCK::R1(E),XP(d)
    • B(h);N_GUARD::QAB(I),XR(g)
  • Tries
    • Try
      • R(E);
      • Threat
        • P(C)
      • Vars
        • R(e);SBLOCK,S_CUTB(b)::R(E)
      • Refutation
        • P(d);XP(C)
    • Try
      • P(B);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::R1(E),XP(d)
      • Refutation
        • B(b);XP(B)
  • Actual
    • R(E);N_PINR(g)
    • Threat
      • P(C)
    • Vars
      • R(g);OGATEB,P_PINP(C),P_SPINR(g),XP(B)::QAB(I)+R(E)
      • P(d);N_GUARD,XP(C)::S(G)
      • R(e);SBLOCK,S_CUTB(b)::R1(E)
      • R(g);N_GUARD,S_CUTB(b)::S(G)
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