MESON Chess Problem Database

Problem Display
PID: 170165 (8/3R2K1/8/b3p3/B1p5/B1k1P3/3p1Q1R/1n6 w - - 0 1)

Jaeger, Peter R

Tages-Anzeiger, 1984

8/3R2K1/8/b3p3/B1p5/B1k1P3/3p1Q1R/1n6

#2

7 + 6

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sxa3
      • 2.Qxd2#
    • 1...d1Q
      • 2.Qb2#
    • 1...d1S
      • 2.Qc2#
    • 1...d1B
      • 2.Qb2#
    • 1...d1R
      • 2.Qb2#
      • 2.Qc2#
    • 1...e4
      • 2.Qf6#
  • Tries
    • 1.Rh3?
      • threat
        • 2.e4#
      • 1...Sxa3
        • 2.Qxd2#
      • 1...d1Q
        • 2.Qb2#
      • 1...d1S
        • 2.Qc2#
      • 1...d1B
        • 2.Qb2#
      • 1...d1R
        • 2.Qb2#
        • 2.Qc2#
      • 1...e4
        • 2.Qf6#
      • 1...Bb6!
    • 1.e4?
      • threat
        • 2.Rh3#
        • 2.Qe3#
        • 2.Qg3#
        • 2.Qf3#
      • 1...Sxa3
        • 2.Qxd2#
      • 1...d1Q
        • 2.Qb2#
      • 1...d1S
        • 2.Qc2#
      • 1...d1B
        • 2.Qe3#
        • 2.Qb2#
      • 1...d1R
        • 2.Qb2#
        • 2.Qc2#
      • 1...Bb6!
  • Keys
    • 1.Qf8!
      • 1...Sxa3
        • 2.Qxa3#
      • 1...d1Q
        • 2.Bb2#
      • 1...d1S
        • 2.Rc2#
      • 1...d1B
        • 2.Bb2#
      • 1...d1R
        • 2.Bb2#
        • 2.Rc2#
      • 1...Bb4
        • 2.Qxb4#
      • 1...Bb6
        • 2.Qb4#
      • 1...Bc7
        • 2.Qb4#
      • 1...Bd8
        • 2.Qb4#
      • 1...e4
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 4
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,XB(C)::QAB1(A),XP(b)
    • P(b);OGATE::QAB1(A)
    • P(b);OGATE::QAR1(A)
    • P(f);OGATEB::QAB(A)
  • Tries
    • Try
      • R(B);
      • Threat
        • R(B)+P(D)
      • Vars
        • S(a);N_GUARD,XB(C)::QAB1(A),XP(b)
        • P(b);OGATE::QAB1(A)
        • P(b);OGATE::QAR1(A)
        • P(f);OGATEB::QAB(A)
      • Refutation
        • B(e);
    • Try
      • P(D);
      • Threat
        • DUALS(4)
      • Vars
        • S(a);N_GUARD,XB(C)::QAB1(A),XP(b)
        • P(b);OGATE::QAB1(A)
        • P(b);OGATE::QAR1(A)
      • Refutation
        • B(e);
  • Actual
    • Q(A);
    • Vars
      • S(a);OGATE,XB(C)::QAR2(A),XS(a)
      • P(b);::B(C)
      • P(b);OGATE::R1(B)
      • B(e);N_GUARD::QAB1(A),XB(e)
      • B(e);N_GUARD::QAB1(A)
      • P(f);OGATEB::QAB(A)
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