MESON Chess Problem Database

Problem Display
PID: 206781 (1r6/1N5P/4p3/3kN1Q1/3pp2K/1p3p1p/1BPn3r/3R4 w - - 0 1)

Kastner, Bernhard

Neue Berliner Schachzeitung, 1870

1r6/1N5P/4p3/3kN1Q1/3pp2K/1p3p1p/1BPn3r/3R4

#2

8 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Rxd4#
      • 2.c4#
    • 1...Sf1
      • 2.Rxd4#
      • 2.c4#
    • 1...Sc4
      • 2.Rxd4#
  • Tries
    • 1.Qxd2?
      • threat
        • 2.Qa5#
        • 2.Qxd4#
      • 1...Kxe5
        • 2.Qg5#
      • 1...Rxb7
        • 2.Qxd4#
      • 1...e3
        • 2.Qxd4#
      • 1...Ra8
        • 2.Qxd4#
      • 1...Rc8
        • 2.Qxd4#
      • 1...d3
        • 2.Qa5#
        • 2.c4#
      • 1...Rxd2!
    • 1.Qd8+?
      • 1...Kxe5
        • 2.Qg5#
      • 1...Rxd8!
    • 1.c4+?
      • 1...Sxc4
        • 2.Rxd4#
      • 1...dxc4 ep!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qxd4#
      • 1...Kxe5
        • 2.Qg5#
      • 1...dxe3
        • 2.c4#
      • 1...d3
        • 2.Qd4#
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • S(a);OGATE,P_SPINP(f)::R1(A),XP(f)
  • Tries
    • Try
      • Q(F);P_PINP(f),XS(a)
      • Threat
        • DUALS(2)
      • Vars
        • K(h);OGATEB,P-FLIGHT,XS(E)::QAR2(F)
        • R(j);XS(G)::QAR1(F),XP(f)
        • P(g);::QAR1(F),XP(f)
        • R(j);::QAR1(F),XP(f)
      • Refutation
        • R(b);N_SPINP(f),XQ(F)
    • Try
      • Q(F);CHECK
      • Vars
        • K(h);OGATEB,P-FLIGHT,P_SPINP(f),XS(E)::QAR2(F)
      • Refutation
        • R(j);XQ(F)
    • Try
      • P(C);CHECK
      • Vars
        • S(a);OGATE,P_SPINP(f),XP(C)::R1(A),XP(f)
      • Refutation
        • P(f);EP,P_SPINS(a),XP(C)
  • Actual
    • Q(F);
    • Threat
      • QAR1(F),XP(f)
    • Vars
      • K(h);OGATEB,P-FLIGHT,P_SPINP(f),XS(E)::QAR2(F)
      • P(f);N_GUARD,P_SPINS(a),XQ(F)::P(C)
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