MESON Chess Problem Database

Problem Display
PID: 121537 (8/K1N2N2/5p2/2P2r2/3k4/p3p3/1P2P3/7Q w - - 0 1)

Zalkind, Lazar Borissovich

Shakhmaty, 1926

8/K1N2N2/5p2/2P2r2/3k4/p3p3/1P2P3/7Q

#2

7 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf1
      • 2.Qd5#
    • 1...Rf2
      • 2.Qd5#
    • 1...Rf4
      • 2.Qd5#
    • 1...Rxc5
      • 2.Qh4#
    • 1...Rd5
      • 2.Qxd5#
  • Tries
    • 1.Qe4+?
      • 1...Kxc5
        • 2.b4#
      • 1...Kxe4!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Qb4#
      • 1...Kc4
        • 2.Qc3#
      • 1...Ke4
        • 2.Qb4#
      • 1...Kxc5
        • 2.Qc3#
      • 1...Rxc5
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(d);N_GUARD::QAR1(A)
    • R(d);N_GUARD,SBLOCK,XP(D)::QAR(A)
    • R(d);N_GUARD::QAR1(A),XR(d)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XP(D)::P(B)
      • Refutation
        • K(c);P-FLIGHT,XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(c);P-FLIGHT::QAR1(A)
      • K(c);P-FLIGHT::QAR(A)
      • K(c);S_FLIGHT,XP(D)::QAR2(A)
      • R(d);N_GUARD,SBLOCK,XP(D)::QAR(A)
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