MESON Chess Problem Database

Problem Display
PID: 96631 (4KN2/8/1p6/1P3k2/4N2p/2R4p/3R3P/Q1B5 w - - 0 1)

Pernaric, Josip

Best Problems, 2005

4KN2/8/1p6/1P3k2/4N2p/2R4p/3R3P/Q1B5

#2

9 + 4

6490 yacpdb 2009
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Tries
    • 1.Sf2?
      • 1...Kf4
        • 2.Rd5#
      • 1...Ke5
        • 2.Rf3#
      • 1...Kf6
        • 2.Rc5#
      • 1...Kg5!
    • 1.Re2?
      • 1...Ke5
        • 2.Rc5#
      • 1...Kg4!
    • 1.Rd4?
      • 1...Kg4
        • 2.Sg3#
      • 1...Ke5!
    • 1.Rd5+?
      • 1...Kg4
        • 2.Sf2#
        • 2.Sf6#
        • 2.Rg5#
      • 1...Kxe4!
  • Keys
    • 1.Sf6!
      • 1...Kf4
        • 2.Rd5#
      • 1...Ke5
        • 2.Rf3#
      • 1...Kg5
        • 2.Rf2#
      • 1...Kxf6
        • 2.Rc5#

Anticipated by 23456(1963), 7474(1990), 35815(1991-1992), 108119(1998)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(F);
      • Vars
        • K(c);P-FLIGHT::B(B)+R(C)
        • K(c);P-FLIGHT::QAB(A)+R(E)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(C);
      • Vars
        • K(c);P-FLIGHT::QAB(A)+R(E),DCHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • R(C);
      • Vars
        • K(c);S_FLIGHT::R(C)+S(F)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(C);CHECK
      • Refutation
        • K(c);S_FLIGHT,XS(F)
  • Actual
    • S(F);
    • Vars
      • K(c);P-FLIGHT::B(B)+R(C)
      • K(c);P-FLIGHT::QAB(A)+R(E)
      • K(c);P-FLIGHT,XS(F)::QAB(A)+R(E)
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