MESON Chess Problem Database

Problem Display
PID: 162877 (3R2N1/2p3p1/n6p/1NR1pk2/2p5/8/2n4K/2B3Q1 w - - 0 1)

Sutara, Josef

Kolnische Rundschau, 1969

(First published on Wed Oct 15 1969)

3R2N1/2p3p1/n6p/1NR1pk2/2p5/8/2n4K/2B3Q1

#2

7 + 8

15601 Albrecht-Leiss-Degener Collection 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qg4#
    • 1...Ke6
      • 2.Qg6#
  • Tries
    • 1.Sd4+?
      • 1...Ke4
        • 2.Qg6#
      • 1...Sxd4!
    • 1.Sd6+?
      • 1...Ke6
        • 2.Qg4#
        • 2.Qg6#
      • 1...cxd6!
    • 1.Qf1+?
      • 1...Ke4
        • 2.Sc3#
      • 1...Kg4
        • 2.Qh3#
      • 1...Ke6
        • 2.Rc6#
      • 1...Kg6!
    • 1.Qg5+?
      • 1...Ke4
        • 2.Qg4#
      • 1...Ke6
        • 2.Qg6#
      • 1...hxg5!
  • Keys
    • 1.Rf8+!
      • 1...Ke4
        • 2.Qg6#
      • 1...Ke6
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • K(d);N_SPINP(c),S_FLIGHT::QAR2(B)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(d);N_SPINP(c),S_FLIGHT::QAB(B)
      • Refutation
        • S(a);XS(D)
    • Try
      • S(D);CHECK
      • Refutation
        • P(g);XS(D)
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);N_SPINP(c),S_FLIGHT::S(D)
        • K(d);N_SPINP(c),S_FLIGHT::QAB1(B)
        • K(d);N_SPINP(c),S_FLIGHT::R(E)
      • Refutation
        • K(d);N_SPINP(c),S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(d);N_SPINP(c),S_FLIGHT::QAR2(B)
      • Refutation
        • P(f);XQ(B)
  • Actual
    • R(F);CHECK
    • Vars
      • K(d);N_SPINP(c),S_FLIGHT::QAB(B)
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