MESON Chess Problem Database

Problem Display
PID: 1006 (K7/1Q6/3B4/k7/8/3r4/Pn6/8 w - - 0 1)

Nymian, HS

The Problemist Supplement, 1996

K7/1Q6/3B4/k7/8/3r4/Pn6/8

#2

4 + 3

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qa6#
      • 2.Qb4#
    • 1...Sa4
      • 2.Bb4#
  • Tries
    • 1.Ka7?
      • threat
        • 2.Qa6#
        • 2.Qb4#
      • 1...Ka4
        • 2.Qa6#
        • 2.Qb4#
      • 1...Rb3
        • 2.Qa6#
      • 1...Rd4
        • 2.Qa6#
      • 1...Rxd6!
    • 1.Qb6+?
      • 1...Ka4
        • 2.Qb4#
        • 2.Qa6#
      • 1...Kxb6!
  • Keys
    • 1.a4!
      • threat
        • 2.Qb5#
        • 2.Qa7#
      • 1...Kxa4
        • 2.Qb4#
      • 1...Rxd6
        • 2.Qb5#
      • 1...Sxa4
        • 2.Bb4#
      • 1...Rb3
        • 2.Qa7#
      • 1...Rd5
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::B(B)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAR1(C)
      • Refutation
        • R(b);XB(B)
    • Try
      • Q(C);CHECK
      • Refutation
        • K(c);S_FLIGHT,XQ(C)
  • Actual
    • P(A);
    • Threat
      • DUALS(2)
    • Vars
      • K(c);P-FLIGHT,XP(A)::QAR1(C)
      • R(b);XB(B)::QAR1(C)
      • S(a);SBLOCK,XP(A)::B(B)
      • R(b);::QAR2(C)
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