MESON Chess Problem Database

Problem Display
PID: 198115 (8/8/8/8/7R/3pk2n/1Q6/4nK2 w - - 0 1)

Riedel, Paul

Schwabische Tagwacht, 1920

8/8/8/8/7R/3pk2n/1Q6/4nK2

#2

3 + 4

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sg1
      • 2.Qf2#
    • 1...Sf2
      • 2.Qxf2#
    • 1...Sg5
      • 2.Qf2#
  • Tries
    • 1.Qd4+?
      • 1...Kf3
        • 2.Rxh3#
      • 1...Kd2!
  • Keys
    • 1.Qb4!
      • 1...Kf3
        • 2.Rxh3#
      • 1...d2
        • 2.Qe4#
      • 1...Sc2
        • 2.Rxh3#
      • 1...Sg2
        • 2.Rxh3#
      • 1...Sf3
        • 2.Re4#
      • 1...Sg1
        • 2.Qf4#
      • 1...Sf2
        • 2.Qf4#
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sg5
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD::QAB1(B)
    • S(d);N_GUARD::QAB1(B),XS(d)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(c);P-FLIGHT::R(C),XS(d)
      • Refutation
        • K(c);P_SPINP(b),S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(c);P-FLIGHT::R(C),XS(d)
      • P(b);SBLOCK::QAR1(B)
      • S(a);N_GUARD::R(C),XS(d)
      • S(a);SBLOCK::R1(C)
      • S(d);N_GUARD::QAB1(B)
      • S(d);N_GUARD::QAB1(B),XS(d)
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