MESON Chess Problem Database

Problem Display
PID: 32849 (kN5r/NR5R/8/8/8/8/8/rQ3B1K w - - 0 1)

von Szasz, Lajos

Ujsag, 1926

kN5r/NR5R/8/8/8/8/8/rQ3B1K

#2

7 + 3

20 De Problemist 1929
3713 Snap 2012
14868 Pirnie Collection 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa7
      • 2.Rxa7#
    • 1...Rxb8
      • 2.Rxb8#
  • Tries
    • 1.Rxh8?
      • threat
        • 2.Sa6#
        • 2.Sbc6#
        • 2.Sd7#
      • 1...Ra6
        • 2.Sxa6#
        • 2.Sbc6#
        • 2.Sd7#
      • 1...Rxb1!
    • 1.Qxa1?
      • threat
        • 2.Sb5#
        • 2.Sac6#
        • 2.Sc8#
      • 1...Rc8
        • 2.Sb5#
        • 2.Sac6#
        • 2.Sxc8#
      • 1...Rxh7+!
  • Keys
    • 1.Bg2!
      • threat
        • 2.Rb2#
        • 2.Rb3#
        • 2.Rb4#
        • 2.Rb5#
        • 2.Rb6#
        • 2.Rc7#
        • 2.Rd7#
        • 2.Re7#
        • 2.Rf7#
        • 2.Rg7#
      • 1...Rxb1+
        • 2.Rxb1#
      • 1...Rxh7+
        • 2.Rxh7#
      • 1...Rxa7
        • 2.Rxa7#
      • 1...Rxb8
        • 2.Rxb8#
      • 1...Ra2
        • 2.Rb2#
      • 1...Ra3
        • 2.Rb3#
      • 1...Ra4
        • 2.Rb4#
      • 1...Ra5
        • 2.Rb5#
      • 1...Ra6
        • 2.Rb6#
      • 1...Rc8
        • 2.Rbc7#
      • 1...Rd8
        • 2.Rbd7#
      • 1...Re8
        • 2.Rbe7#
      • 1...Rf8
        • 2.Rbf7#
      • 1...Rg8
        • 2.Rbg7#

Anticipated by 144923(1900)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • R(a);OGATE,XS(D)::R1(E),XR(a)
    • R(c);N_PINR(F),OGATE,XS(G)::R1(E),XR(c)
  • Tries
    • Try
      • R(F);N_SPINR(F),XR(c)
      • Threat
        • DUALS(3)
      • Refutation
        • R(a);P_PINB(B),XQ(A)
    • Try
      • Q(A);XR(a)
      • Threat
        • DUALS(3)
      • Refutation
        • R(c);CHECK,XR(F)
  • Actual
    • B(B);P_SPINQ(A)
    • Threat
      • DUALS(10)
    • Vars
      • R(a);CHECK,OGATE,XQ(A)::B(B)+R(E),XR(a)
      • R(c);CHECK,OGATE,XR(F)::B(B)+R(E),XR(c)
      • R(a);N_PINQ(A),OGATE,XS(D)::B(B)+R(E),DCHECK,XR(a)
      • R(c);N_PINR(F),OGATE,XS(G)::B(B)+R(E),DCHECK,XR(c)
      • R(a);N_PINQ(A)::B(B)+R(E)
      • R(c);N_PINR(F)::B(B)+R(E)
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