MESON Chess Problem Database

Problem Display
PID: 262528 (3r4/n1R5/2bnN3/5p1q/1P4r1/Bpk5/8/1KNR1B2 w - - 0 1)

Hjelle, David

Europe Echecs, 1970

3r4/n1R5/2bnN3/5p1q/1P4r1/Bpk5/8/1KNR1B2

#2

8 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb4
      • 2.Bb2#
    • 1...Rc4
      • 2.Rd3#
    • 1...Sc4
      • 2.Se2#
  • Tries
    • 1.Rxc6+?
      • 1...Rc4
        • 2.Rd3#
      • 1...Sc4
        • 2.Se2#
      • 1...Sxc6!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sa4#
      • 1...Be4+
        • 2.Sxe4#
      • 1...Rxb4
        • 2.Bb2#
      • 1...Rc4
        • 2.Rd3#
      • 1...Ba4
        • 2.Sxa4#
        • 2.Se4#
      • 1...Sc4
        • 2.Se2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK,XP(F)::B(E)
    • R(c);N_SPINB(f),SBLOCK::R1(C)
    • S(g);N_SPINB(f),SBLOCK::S(B)
  • Tries
    • Try
      • R(H);CHECK,XB(f)
      • Vars
        • R(c);P_SPINR(c)::R1(C)
        • S(g);P_SPINS(g)::S(B)
      • Refutation
        • S(h);XR(H)
  • Actual
    • S(G);N_PINB(f)
    • Threat
      • S(G)
    • Vars
      • B(f);CHECK::R(H)+S(G),DCHECK,XB(f)
      • R(c);SBLOCK,XP(F)::B(E)
      • R(c);SBLOCK::R1(C)
      • S(g);SBLOCK::S(B)
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