MESON Chess Problem Database

Problem Display
PID: 170205 (5N2/6Qb/3p4/2n2k2/2B5/K2PP2P/8/5N1n w - - 0 1)

Jaeger, Peter R

Tages-Anzeiger, 1989

5N2/6Qb/3p4/2n2k2/2B5/K2PP2P/8/5N1n

#2

8 + 5

6490 yacpdb 2018
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sf2
      • 2.Sg3#
    • 1...Sg3
      • 2.Sxg3#
    • 1...Sb3
      • 2.Be6#
    • 1...Sxd3
      • 2.Bxd3#
    • 1...Sa4
      • 2.Be6#
    • 1...Se4
      • 2.Be6#
    • 1...Sa6
      • 2.Be6#
    • 1...Se6
      • 2.Bxe6#
    • 1...Sb7
      • 2.Be6#
    • 1...Sd7
      • 2.Be6#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Qf6#
        • 2.Qg4#
      • 1...Sxd3
        • 2.Qg4#
      • 1...Bg6
        • 2.Qf6#
      • 1...Sf2
        • 2.Sg3#
        • 2.Qf6#
      • 1...Se4
        • 2.Qg4#
      • 1...Sxd7!
    • 1.Qg4+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kf6!
    • 1.Qg6+?
      • 1...Ke5
        • 2.d4#
      • 1...Bxg6!
    • 1.Qf7+?
      • 1...Ke5
        • 2.Qf4#
      • 1...Kg5!
    • 1.h4?
      • threat
        • 2.Qg5#
      • 1...Sxd3
        • 2.Bxd3#
      • 1...Se4
        • 2.Be6#
      • 1...Se6
        • 2.Bxe6#
      • 1...Bg6!
  • Keys
    • 1.d4!
      • 1...Ke4
        • 2.Qg4#
      • 1...Bg6
        • 2.Qxg6#
      • 1...Bg8
        • 2.Qg6#
      • 1...Sf2
        • 2.Sg3#
      • 1...Sg3
        • 2.Sxg3#
      • 1...Sb3
        • 2.Bd3#
      • 1...Sd3
        • 2.Bxd3#
      • 1...Sa4
        • 2.Bd3#
      • 1...Se4
        • 2.Be6#
      • 1...Sa6
        • 2.Bd3#
      • 1...Se6
        • 2.Bd3#
      • 1...Sb7
        • 2.Bd3#
      • 1...Sd7
        • 2.Bd3#
      • 1...d5
        • 2.Qe5#

Anticipated by 85763(1970)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 6
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(A)
    • S(a);N_GUARD::S(A),XS(a)
    • S(b);N_GUARD::B(F)
    • S(b);OGATE,XP(C)::B(F),XS(b)
    • S(b);N_GUARD::B(F),XS(b)
  • Tries
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XP(C)::QAB1(G)
        • B(e);::QAR1(G)
        • S(b);::QAB1(G)
      • Refutation
        • S(b);XS(H)
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(G)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);P-FLIGHT::P(C)
      • Refutation
        • B(e);XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);OGATE,P-FLIGHT::QAB1(G)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(E);
      • Threat
        • QAR1(G)
      • Vars
        • S(b);OGATE,XP(C)::B(F),XS(b)
        • S(b);N_GUARD::B(F)
        • S(b);N_GUARD::B(F),XS(b)
      • Refutation
        • B(e);
  • Actual
    • P(C);
    • Vars
      • K(c);S_FLIGHT::QAR2(G)
      • B(e);N_GUARD::QAB1(G),XB(e)
      • B(e);N_GUARD::QAB1(G)
      • S(a);N_GUARD::S(A)
      • S(a);N_GUARD::S(A),XS(a)
      • S(b);N_GUARD::B(F)
      • S(b);N_GUARD::B(F),XS(b)
      • S(b);N_GUARD,SBLOCK::B(F)
      • P(d);N_GUARD::QAR1(G)
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