MESON Chess Problem Database

Problem Display
PID: 87821 (1NRB4/p2KP3/Q1N5/2kp4/2p5/2qP4/n2b4/8 w - - 0 1)

Stavrinides, Alkis

The Problemist, 1968

1NRB4/p2KP3/Q1N5/2kp4/2p5/2qP4/n2b4/8

#2

8 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.d4#
    • 1...Qa5
      • 2.d4#
    • 1...Qc1
      • 2.d4#
    • 1...Qc2
      • 2.d4#
    • 1...Qa3
      • 2.d4#
    • 1...Qb3
      • 2.d4#
    • 1...Sb4
      • 2.Qa5#
  • Tries
    • 1.Sd4+?
      • 1...Kb4
        • 2.Qa5#
      • 1...Kxd4!
  • Keys
    • 1.Qa4!
      • threat
        • 2.Sa6#
      • 1...d4
        • 2.Sb4#
      • 1...Qa5
        • 2.d4#
      • 1...Sb4
        • 2.Qa5#
      • 1...a6
        • 2.Sxa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • Q(c);N_GUARD::P(A)
    • S(a);S_CUTQ(c)::QAR2(B)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(e);S_FLIGHT::QAB1(B)
      • Refutation
        • K(e);S_FLIGHT,XS(C)
  • Actual
    • Q(B);
    • Threat
      • S(F)
    • Vars
      • P(f);SBLOCK::R(G)+S(C)
      • Q(c);N_GUARD::P(A)
      • S(a);S_CUTQ(c)::QAR2(B)
      • P(g);::S(F),XP(g)
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