MESON Chess Problem Database

Problem Display
PID: 87813 (K7/8/2n1Q1n1/1N2p1pN/RP2k3/8/4B2p/2b4q w - - 0 1)

Spodin, Nikolai Ivanovich

Problemista, 1966

K7/8/2n1Q1n1/1N2p1pN/RP2k3/8/4B2p/2b4q

#2

7 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Qh3?
      • threat
        • 2.Qd3#
      • 1...Kd5
        • 2.Sf6#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qd1
        • 2.Qf3#
      • 1...Sd4
        • 2.Sc3#
      • 1...Sf4
        • 2.Sf6#
      • 1...Be3!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qd3#
      • 1...Kf5
        • 2.Sd6#
      • 1...Qf3
        • 2.Qxf3#
      • 1...Qd1
        • 2.Qf3#
      • 1...Sd4
        • 2.Sd6#
      • 1...Sf4
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(F);N_PINP(e)
      • Threat
        • QAB1(F)
      • Vars
        • K(d);S_FLIGHT::S(E)
        • Q(b);N_GUARD::QAB1(F),XQ(b)
        • Q(b);N_GUARD::QAB1(F)
        • S(g);SBLOCK::S(D)
        • S(h);SBLOCK::S(E)
      • Refutation
        • B(a);
  • Actual
    • Q(F);N_PINP(e)
    • Threat
      • QAB1(F)
    • Vars
      • K(d);S_FLIGHT::S(D)
      • Q(b);N_GUARD::QAB1(F),XQ(b)
      • Q(b);N_GUARD::QAB1(F)
      • S(g);SBLOCK::S(D)
      • S(h);SBLOCK::S(E)
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