MESON Chess Problem Database

Problem Display
PID: 234692 (8/8/R1p5/7Q/1pk5/8/2NK4/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2011

8/8/R1p5/7Q/1pk5/8/2NK4/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...b3
      • 2.Ra4#
      • 2.Rxc6#
  • Tries
    • 1.Ra2?
      • 1...Kb3
        • 2.Qf7#
      • 1...b3
        • 2.Ra4#
      • 1...c5!
    • 1.Rb6?
      • threat
        • 2.Rxb4#
      • 1...b3
        • 2.Rb4#
        • 2.Rxc6#
      • 1...c5
        • 2.Qf7#
      • 1...Kb3!
    • 1.Qa5?
      • 1...Kb3
        • 2.Qxb4#
        • 2.Qa2#
      • 1...b3
        • 2.Rxc6#
      • 1...c5!
    • 1.Qc5+?
      • 1...Kb3
        • 2.Qxb4#
      • 1...Kxc5!
    • 1.Qf5?
      • 1...c5
        • 2.Qd3#
      • 1...b3
        • 2.Ra4#
        • 2.Rxc6#
      • 1...Kb3!
  • Keys
    • 1.Qf3!
      • 1...Kb5
        • 2.Qxc6#
      • 1...Kc5
        • 2.Qxc6#
      • 1...b3
        • 2.Qxc6#
      • 1...c5
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(D);
      • Vars
        • K(b);S_FLIGHT::QAB(C)
        • P(a);OGATEB,SBLOCK::R(D)
      • Refutation
        • P(c);
    • Try
      • R(D);
      • Threat
        • R1(D),XP(a)
      • Vars
        • P(c);SBLOCK::QAB(C)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(C);
      • Vars
        • P(a);SBLOCK::R(D),XP(c)
      • Refutation
        • P(c);
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR1(C),XP(a)
      • Refutation
        • K(b);P-FLIGHT,XQ(C)
    • Try
      • Q(C);
      • Vars
        • P(c);SBLOCK::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(C);
    • Vars
      • K(b);S_FLIGHT::QAB1(C),XP(c)
      • K(b);P-FLIGHT::QAR1(C),XP(c)
      • P(a);SBLOCK::QAR2(C),XP(c)
      • P(c);SBLOCK::QAB1(C)
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