MESON Chess Problem Database

Problem Display
PID: 23204 (8/8/8/8/k1K2b2/B1Q5/1r6/8 w - - 0 1)

Lincoln, Robert A

Fun with Chess Miniatures, 1996

8/8/8/8/k1K2b2/B1Q5/1r6/8

#2

3 + 3

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Qb4#
    • 1...Rd2
      • 2.Qb4#
    • 1...Re2
      • 2.Qb4#
    • 1...Rf2
      • 2.Qb4#
    • 1...Rg2
      • 2.Qb4#
    • 1...Rh2
      • 2.Qb4#
    • 1...Rb4+
      • 2.Qxb4#
  • Tries
    • 1.Bxb2?
      • threat
        • 2.Qb4#
        • 2.Qa3#
      • 1...Bd2
        • 2.Qa3#
      • 1...Bd6!
  • Keys
    • 1.Bb4!
      • threat
        • 2.Qa3#
      • 1...Rxb4+
        • 2.Qxb4#
      • 1...Ra2
        • 2.Qb3#
      • 1...Rc2
        • 2.Qxc2#
      • 1...Rb3
        • 2.Qxb3#

Anticipated by 183165(1907)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(a);N_GUARD::QAR1(B)
    • R(a);N_GUARD,SBLOCK::QAR1(B)
    • R(a);CHECK,N_GUARD::QAR1(B),XR(a)
  • Tries
    • Try
      • B(A);XR(a)
      • Threat
        • DUALS(2)
      • Vars
        • B(c);::QAR1(B)
      • Refutation
        • B(c);
  • Actual
    • B(A);
    • Threat
      • QAR1(B)
    • Vars
      • R(a);CHECK,OGATE,XB(A)::QAR1(B),XR(a)
      • R(a);N_GUARD::QAB1(B)
      • R(a);N_GUARD,P_PINQ(B)::QAB(B),XR(a)
      • R(a);N_GUARD::QAB1(B),XR(a)
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