MESON Chess Problem Database

Problem Display
PID: 189677 (4n3/2p1KQP1/3p4/6kp/5R2/7p/8/1b6 w - - 0 1)

Fleckner, Otto

Deutsches Wochenschach, 1912

4n3/2p1KQP1/3p4/6kp/5R2/7p/8/1b6

#2

4 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sf6
      • 2.Qxf6#
    • 1...Sxg7
      • 2.Qf6#
  • Tries
    • 1.g8Q+?
      • 1...Bg6
        • 2.Qgxg6#
      • 1...Sg7
        • 2.Qf6#
      • 1...Kh6!
    • 1.g8R+?
      • 1...Bg6
        • 2.Rxg6#
      • 1...Sg7
        • 2.Qf6#
      • 1...Kh6!
  • Keys
    • 1.Rh4!
      • threat
        • 2.Qxh5#
      • 1...Kxh4
        • 2.Qf4#
      • 1...Kh6
        • 2.Rxh5#
      • 1...Sxg7
        • 2.Qf6#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Bg6
        • 2.Qf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(g);N_GUARD::QAB1(C),XS(g)
    • S(g);N_GUARD,XP(D)::QAB1(C)
  • Tries
    • Try
      • P(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::QAR1(D),XB(a)
        • S(g);P_SPINS(g)::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • P(D);CHECK
      • Vars
        • B(a);N_GUARD,P_SPINB(a)::R1(D),XB(a)
        • S(g);P_SPINS(g)::QAB1(C)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(A);
    • Threat
      • QAR1(C),XP(d)
    • Vars
      • K(c);S_FLIGHT,XR(A)::QAR2(C)
      • K(c);P_SPINP(d),S_FLIGHT::R1(A),XP(d)
      • S(g);N_GUARD,XP(D)::QAB1(C)
      • S(g);N_GUARD::QAB1(C),XS(g)
      • B(a);SBLOCK::QAB1(C)
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