MESON Chess Problem Database

Problem Display
PID: 234654 (4Rb2/p4K2/1R4Q1/8/k7/8/8/8 w - - 0 1)

Lincoln, Robert A

Kudesnik, 2007

4Rb2/p4K2/1R4Q1/8/k7/8/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Qc2+?
      • 1...Ka3
        • 2.Re3#
        • 2.Qb3#
      • 1...Ka5!
    • 1.Qc6+?
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka3!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Ra6#
      • 1...Ka3
        • 2.Ra6#
        • 2.Qa1#
        • 2.Qb3#
      • 1...Ka5
        • 2.Qb5#
      • 1...axb6
        • 2.Ra8#
      • 1...Bb4
        • 2.Qxb4#
      • 1...a5
        • 2.Qb3#
      • 1...a6
        • 2.Rxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);CHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • R(A)
    • Vars
      • K(a);P-FLIGHT::QAR1(B)
      • P(b);OGATEB,XR(A)::R(D)
      • B(c);N_GUARD::QAR1(B),XB(c)
      • P(b);SBLOCK::QAB1(B)
      • P(b);::R(A),XP(b)
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