MESON Chess Problem Database

Problem Display
PID: 120809 (8/5Q1N/4p3/8/6kp/6p1/8/4K2R w K - 0 1)

Belliboni, Caetano

Diario de Sao Paulo, 1945

8/5Q1N/4p3/8/6kp/6p1/8/4K2R

#2

4 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rf1?
      • 1...g2
        • 2.Qf3#
      • 1...h3
        • 2.Rf4#
      • 1...e5
        • 2.Qf5#
      • 1...Kh3!
    • 1.Qxe6+?
      • 1...Kf3
        • 2.0-0#
      • 1...Kf4
        • 2.Rf1#
        • 2.0-0#
      • 1...Kh5!
    • 1.Qf4+?
      • 1...Kh5
        • 2.Qg5#
      • 1...Kxf4!
  • Keys
    • 1.0-0!
      • 1...Kh3
        • 2.Qxe6#
      • 1...g2
        • 2.Qf3#
      • 1...h3
        • 2.Rf4#
      • 1...e5
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);
      • Vars
        • P(a);::QAB1(C)
        • P(c);SBLOCK::R1(B)
        • P(d);N_GUARD::QAB1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(C);CHECK,XP(d)
      • Vars
        • K(b);S_FLIGHT::0-0
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
    • Try
      • Q(C);CHECK
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAR1(C)
      • Refutation
        • K(b);P-FLIGHT,XQ(C)
  • Actual
    • K(A);0-0
    • Vars
      • K(b);S_FLIGHT::QAB(C),XP(d)
      • P(a);::QAB1(C)
      • P(c);SBLOCK::R1(B)
      • P(d);N_GUARD::QAB1(C)
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