MESON Chess Problem Database

Problem Display
PID: 189957 (rN2b3/p3B3/2p5/kpQp4/8/2n5/8/K7 w - - 0 1)

Traxler, Karel Peter

Deutsche Schachzeitung, 1913

rN2b3/p3B3/2p5/kpQp4/8/2n5/8/K7

#2

4 + 8

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Ka4
      • 2.Qa3#
      • 2.Qb4#
    • 1...Rxb8
      • 2.Qxa7#
  • Tries
    • 1.Qa3+?
      • 1...Sa4
        • 2.Bd8#
      • 1...Kb6!
    • 1.Qxc3+?
      • 1...Ka4
        • 2.Qb4#
        • 2.Qa3#
      • 1...b4
        • 2.Qxb4#
      • 1...Kb6!
  • Keys
    • 1.Qd4!
      • threat
        • 2.Bd8#
      • 1...Rxb8
        • 2.Qxa7#
      • 1...b4
        • 2.Qxb4#
      • 1...Sa4
        • 2.Bb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(g);N_GUARD,XS(D)::QAR2(B),XP(f)
  • Tries
    • Try
      • Q(B);CHECK,N_PINP(c)
      • Vars
        • S(a);P_SPINS(a)::B(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK,N_PINP(c),XS(a)
      • Vars
        • P(c);P_SPINP(c)::QAB1(B),XP(c)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(B);N_PINP(c)
    • Threat
      • B(C)
    • Vars
      • R(g);N_GUARD,XS(D)::QAR2(B),XP(f)
      • P(c);::QAB1(B),XP(c)
      • S(a);SBLOCK::B(C)
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