MESON Chess Problem Database

Problem Display
PID: 59160 (6n1/4P3/2PK2pB/4p2P/3pkn2/8/5R2/Q2R4 w - - 0 1)

Degener, Udo

Troll, 1999

6n1/4P3/2PK2pB/4p2P/3pkn2/8/5R2/Q2R4

#2

8 + 6

14503 Problemschach-Jahrbuch (1999) 2000

SOLUTION

  • SOUND
  • Sets
    • 1...d3
      • 2.Qxe5#
  • Tries
    • 1.e8Q?
      • threat
        • 2.Qxe5#
      • 1...Ke3
        • 2.Qxd4#
      • 1...Kf5
        • 2.Qxg6#
      • 1...Sd3
        • 2.Qxg6#
      • 1...Se6
        • 2.Qxg6#
      • 1...Se7!
  • Keys
    • 1.Qa5!
      • threat
        • 2.Qxe5#
      • 1...Ke3
        • 2.Qe1#
      • 1...Kf5
        • 2.Rxf4#
      • 1...Sd3
        • 2.Qd5#
      • 1...Sd5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(a);OGATE::QAR1(A),XP(d)
  • Tries
    • Try
      • P(H);P_PINP(d)
      • Threat
        • QAR1(H),XP(d)
      • Vars
        • K(b);P-FLIGHT,P_SPINS(c)::QAB1(A),XP(a)
        • K(b);N_SPINP(d),P_SPINS(c),S_FLIGHT::QAB1(H),XP(e)
        • S(c);N_GUARD::QAB(H),XP(e)
        • S(c);N_GUARD,N_SPINP(d)::QAB(H),XP(e)
      • Refutation
        • S(f);N_SPINP(d)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A),XP(d)
    • Vars
      • K(b);P-FLIGHT,P_SPINS(c)::QAR2(A)
      • K(b);P_SPINP(d),P_SPINS(c),S_FLIGHT::R1(C),XS(c)
      • S(c);N_GUARD::QAB1(A)
      • S(c);N_GUARD::QAB1(A),XS(c)
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