MESON Chess Problem Database

Problem Display
PID: 232938 (4R3/7p/5Pk1/4Q3/7K/7n/8/8 w - - 0 1)

Grassano, Carlos A

Kudesnik, 2010

4R3/7p/5Pk1/4Q3/7K/7n/8/8

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kh6
      • 2.Qh5#
  • Tries
    • 1.Re7?
      • 1...Kh6
        • 2.Qh5#
      • 1...Sg1
        • 2.Qg5#
      • 1...Sf2
        • 2.Qg5#
      • 1...Sf4
        • 2.Qg5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...h6
        • 2.Rg7#
      • 1...h5!
    • 1.Rg8+?
      • 1...Kh6
        • 2.Qh5#
      • 1...Kf7!
  • Keys
    • 1.Rf8!
      • threat
        • 2.Qh5#
      • 1...Kh6
        • 2.Qh5#
      • 1...h5
        • 2.Qxh5#
      • 1...Sf4
        • 2.Qg5#
      • 1...Sg5
        • 2.Qxg5#
      • 1...h6
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • R(D);
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
        • S(a);N_GUARD::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
        • P(c);SBLOCK::R1(D)
      • Refutation
        • P(c);
    • Try
      • R(D);CHECK
      • Vars
        • K(b);P-FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • R(D);
    • Threat
      • QAB1(B)
    • Vars
      • K(b);P-FLIGHT::QAR1(B)
      • P(c);::QAB1(B),XP(c)
      • S(a);N_GUARD::QAR1(B)
      • S(a);N_GUARD::QAR1(B),XS(a)
      • P(c);SBLOCK::QAB(B)
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