MESON Chess Problem Database

Problem Display
PID: 229049 (1NR1B3/p3k3/R7/pn4P1/rq3Q1K/B6p/4r3/1b6 w - - 0 1)

Grigoriev, K

64 Shakhmatnoe obozrenie, 1926

1NR1B3/p3k3/R7/pn4P1/rq3Q1K/B6p/4r3/1b6

#2

8 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Be4
      • 2.Qf6#
      • 2.Qf7#
    • 1...Sd4
      • 2.Qf6#
      • 2.Qf7#
  • Tries
    • 1.Bxb4+?
      • 1...Sd6
        • 2.Qxd6#
        • 2.Qf6#
        • 2.Qf7#
      • 1...axb4
        • 2.Qf6#
        • 2.Qf7#
      • 1...Rxb4!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Sc6#
      • 1...Rc2
        • 2.Qe4#
      • 1...Re6
        • 2.Rf7#
      • 1...Be4
        • 2.Qe5#
      • 1...Sd4
        • 2.Qc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • B(A);CHECK,N_SPINQ(B),XQ(e)
      • Refutation
        • R(d);P_PINQ(B),XB(A)
  • Actual
    • R(E);
    • Threat
      • S(F)
    • Vars
      • R(b);N_GUARD,S_CUTB(a)::QAR(B)
      • R(b);SBLOCK::R1(E)
      • B(a);N_PINQ(B)::QAR2(B)
      • S(g);N_PINQ(B)::QAR2(B)
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