MESON Chess Problem Database

Problem Display
PID: 77910 (8/2rp4/5p2/2pP1Bp1/Qp2K3/4BP1p/1p6/1k2q1Rr w - - 0 1)

Zalkind, Lazar Borissovich

4th HM., 64 Shakhmatnoe obozrenie, 1925

8/2rp4/5p2/2pP1Bp1/Qp2K3/4BP1p/1p6/1k2q1Rr

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rh2
      • 2.Rxe1#
    • 1...c4
      • 2.Kd4#
    • 1...g4
      • 2.Kf4#
  • Tries
    • 1.d6?
      • threat
        • 2.Kd5#
      • 1...Rh2
        • 2.Rxe1#
      • 1...Qd1!
  • Keys
    • 1.Kd3!
      • threat
        • 2.Kc4#
      • 1...Qf1+
        • 2.Kd2#
      • 1...c4+
        • 2.Kd4#
      • 1...Qc1
        • 2.Ke2#
      • 1...Rh2
        • 2.Rxe1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • R(c);N_GUARD::R(A),XQ(b)
    • P(g);::B(G)+K(E)
    • P(h);::B(G)+K(E)
  • Tries
    • Try
      • P(F);
      • Threat
        • B(G)+K(E)
      • Vars
        • R(c);N_GUARD::R(A),XQ(b)
      • Refutation
        • Q(b);N_PINB(B)
  • Actual
    • K(E);N_SPINB(B),S_FLIGHT
    • Threat
      • B(G)+K(E)
    • Vars
      • Q(b);CHECK::B(G)+K(E)
      • P(g);CHECK::B(G)+K(E)
      • Q(b);::B(G)+K(E)
      • R(c);N_GUARD::R(A),XQ(b)
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