MESON Chess Problem Database

Problem Display
PID: 232905 (1R2K3/4p1Q1/k3r3/8/8/p7/r7/R7 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Kudesnik, 2010

1R2K3/4p1Q1/k3r3/8/8/p7/r7/R7

#2

4 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb2
      • 2.Rxa3#
    • 1...Rc2
      • 2.Rxa3#
    • 1...Rd2
      • 2.Rxa3#
    • 1...Rae2
      • 2.Rxa3#
    • 1...Rf2
      • 2.Rxa3#
    • 1...Rg2
      • 2.Rxa3#
    • 1...Rh2
      • 2.Rxa3#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qa4#
      • 1...Re4
        • 2.Qb6#
      • 1...Re5
        • 2.Qb6#
      • 1...Ka5!
  • Keys
    • 1.Qb2!
      • threat
        • 2.Ra8#
      • 1...Ka5
        • 2.Qb5#
      • 1...Ka7
        • 2.Qb7#
      • 1...Rxb2
        • 2.Rxa3#
      • 1...axb2
        • 2.Rxa2#
      • 1...Rb6
        • 2.Qxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(a);OGATE,P_SPINP(b)::R(A),XP(b)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAR2(B)
      • Vars
        • R(d);N_GUARD::QAR1(B)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(B);
    • Threat
      • R(C)
    • Vars
      • K(c);P-FLIGHT::QAR1(B)
      • R(a);OGATE,P_SPINP(b),XQ(B)::R(A),XP(b)
      • P(b);OGATEB,P_SPINR(a),XQ(B)::R(A),XR(a)
      • R(d);N_GUARD::QAR1(B),XR(d)
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