MESON Chess Problem Database

Problem Display
PID: 193725 (8/2N2p2/8/4k2n/3R4/8/3Q4/2K5 w - - 0 1)

Svoboda, Frantisek

Pravo lidu, 1916

8/2N2p2/8/4k2n/3R4/8/3Q4/2K5

#2

4 + 3

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sg3
      • 2.Qf4#
    • 1...Sf4
      • 2.Qxf4#
    • 1...Sf6
      • 2.Qf4#
    • 1...Sg7
      • 2.Qf4#
  • Tries
    • 1.Rd5+?
      • 1...Kf6
        • 2.Qg5#
      • 1...Ke4!
  • Keys
    • 1.Rg4!
      • 1...Kf5
        • 2.Qg5#
      • 1...Kf6
        • 2.Qg5#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sg3
        • 2.Qf4#
      • 1...Sf6
        • 2.Qf4#
      • 1...Sg7
        • 2.Qf4#
      • 1...f5
        • 2.Qd4#
      • 1...f6
        • 2.Qd5#

FEATURES

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