MESON Chess Problem Database

Problem Display
PID: 120996 (K4Q2/1R6/8/8/k7/8/rr6/1R6 w - - 0 1)

Anonymous

Source?, 0000

K4Q2/1R6/8/8/k7/8/rr6/1R6

#2

4 + 3

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Ra7#
      • 2.Qb4#
    • 1...Rd2
      • 2.Ra7#
      • 2.Qb4#
    • 1...Re2
      • 2.Ra7#
      • 2.Qb4#
    • 1...Rf2
      • 2.Ra7#
      • 2.Qb4#
    • 1...Rg2
      • 2.Ra7#
      • 2.Qb4#
    • 1...Rh2
      • 2.Ra7#
      • 2.Qb4#
    • 1...Rb4
      • 2.Qxb4#
  • Tries
    • 1.R1xb2?
      • threat
        • 2.Rxa2#
        • 2.Ra7#
        • 2.Qb4#
      • 1...Ka5
        • 2.Rxa2#
        • 2.Ra7#
      • 1...Ra1
        • 2.Ra7#
        • 2.Qb4#
      • 1...Ra3
        • 2.Ra7#
        • 2.Qb4#
      • 1...Rxb2!
    • 1.R7xb2?
      • threat
        • 2.Rxa2#
        • 2.Qb4#
      • 1...Ka5
        • 2.Rxa2#
      • 1...Ra1
        • 2.Rxa1#
        • 2.Qb4#
      • 1...Ra3
        • 2.Qb4#
      • 1...Rxb2!
  • Keys
    • 1.Qf2!
      • threat
        • 2.Qa7#
      • 1...Ka3
        • 2.Qa7#
      • 1...Ka5
        • 2.Qa7#
      • 1...Rxf2
        • 2.Ra7#
      • 1...Rxb7
        • 2.Qxa2#
      • 1...Rb5
        • 2.Qxa2#
      • 1...Rb6
        • 2.Qxa2#

This anticipates 120762(0000), 17018(1945)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(b);N_GUARD::QAR1(D),XR(b)
  • Tries
    • Try
      • R(A);XR(b)
      • Threat
        • DUALS(3)
      • Refutation
        • R(a);XR(A)
    • Try
      • R(B);XR(b)
      • Threat
        • DUALS(2)
      • Vars
        • K(c);P-FLIGHT::R(B),XR(a)
        • R(a);::QAR1(D)
      • Refutation
        • R(a);XR(B)
  • Actual
    • Q(D);
    • Threat
      • QAR(D)
    • Vars
      • K(c);P-FLIGHT::QAR(D)
      • K(c);P-FLIGHT::QAR2(D)
      • R(b);XQ(D)::R(B)
      • R(b);OGATE,XR(B)::QAR2(D),XR(a)
      • R(b);OGATE::QAR2(D),XR(a)
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