MESON Chess Problem Database

Problem Display
PID: 234624 (8/8/1pQ5/8/pkN5/8/2KP4/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2004

8/8/1pQ5/8/pkN5/8/2KP4/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Sa3?
      • threat
        • 2.Qc3#
      • 1...Ka5
        • 2.Qb5#
      • 1...Kxa3!
    • 1.Sd6?
      • threat
        • 2.Qc3#
      • 1...Ka5
        • 2.Qb5#
      • 1...a3
        • 2.Qb5#
      • 1...Ka3!
    • 1.d3?
      • threat
        • 2.Qxb6#
      • 1...b5
        • 2.Qd6#
      • 1...a3!
    • 1.d4?
      • 1...b5
        • 2.Qc5#
      • 1...a3!
  • Keys
    • 1.Sb2!
      • 1...Ka3
        • 2.Qxa4#
      • 1...Ka5
        • 2.Qxa4#
      • 1...a3
        • 2.Qxb6#
      • 1...b5
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(D)
      • Vars
        • K(b);S_FLIGHT::QAR1(D)
      • Refutation
        • K(b);S_FLIGHT,XS(C)
    • Try
      • S(C);
      • Threat
        • QAB1(D)
      • Vars
        • K(b);S_FLIGHT::QAR1(D)
        • P(a);SBLOCK::QAR1(D)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(B);
      • Threat
        • QAR2(D),XP(c)
      • Vars
        • P(c);SBLOCK::QAB(D)
      • Refutation
        • P(a);
    • Try
      • P(B);
      • Vars
        • P(c);N_GUARD::QAB1(D)
      • Refutation
        • P(a);
  • Actual
    • S(C);
    • Vars
      • K(b);S_FLIGHT::QAR1(D),XP(a)
      • P(a);SBLOCK::QAR2(D),XP(c)
      • P(c);SBLOCK::QAB1(D)
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