MESON Chess Problem Database

Problem Display
PID: 42376 (5Q2/2p5/2R4n/3pp3/4k2P/4p3/4P3/3K1R2 w - - 0 1)

Pirrone, Santi

1st Prize, El Ajedrez Espanol, 1960

5Q2/2p5/2R4n/3pp3/4k2P/4p3/4P3/3K1R2

#2

6 + 6

3749 FIDE Album (1959-1961) 1966
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qb4#
    • 1...d4
      • 2.Qf3#
  • Tries
    • 1.Rg1?
      • 1...Kd4
        • 2.Qb4#
      • 1...Sf5
        • 2.Rg4#
      • 1...Sg4
        • 2.Rxg4#
      • 1...Sg8
        • 2.Rg4#
      • 1...d4
        • 2.Qf3#
      • 1...Sf7!
    • 1.Rc4+?
      • 1...d4
        • 2.Qf3#
      • 1...dxc4!
    • 1.Qa3?
      • threat
        • 2.Qd3#
      • 1...Kd4
        • 2.Qb4#
        • 2.Qd3#
        • 2.Qa4#
      • 1...d4!
    • 1.Qf5+?
      • 1...Kd4
        • 2.Qd3#
      • 1...Sxf5!
    • 1.Qa8?
      • threat
        • 2.Rc4#
      • 1...Kd4
        • 2.Qa4#
      • 1...d4
        • 2.Rxc7#
      • 1...Sf5!
  • Keys
    • 1.Qg7!
      • 1...Kd4
        • 2.Rf4#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Sf5
        • 2.Qg4#
      • 1...Sf7
        • 2.Qg4#
      • 1...Sg8
        • 2.Qg4#
      • 1...d4
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(F)
    • P(c);SBLOCK::QAB1(F)
  • Tries
    • Try
      • R(B);
      • Vars
        • K(b);P-FLIGHT::QAR2(F)
        • S(e);N_GUARD::R(B)
        • S(e);N_GUARD::R(B),XS(e)
        • P(c);SBLOCK::QAB1(F)
      • Refutation
        • S(e);
    • Try
      • R(E);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(F)
      • Refutation
        • P(c);XR(E)
    • Try
      • Q(F);
      • Threat
        • QAB1(F)
      • Refutation
        • P(c);
    • Try
      • Q(F);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(F)
      • Refutation
        • S(e);XQ(F)
    • Try
      • Q(F);
      • Threat
        • R(E)
      • Vars
        • K(b);P-FLIGHT::QAR(F)
        • P(c);OGATEB,SBLOCK::QAB(F)+R(E),XP(f)
      • Refutation
        • S(e);
  • Actual
    • Q(F);
    • Vars
      • K(b);P-FLIGHT,P_SPINP(d)::R(B)
      • S(e);N_GUARD::QAR2(F),XS(e)
      • S(e);N_GUARD::QAR2(F)
      • P(c);SBLOCK::QAB(F)
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