MESON Chess Problem Database

Problem Display
PID: 202831 (8/Q3p3/3pp3/1p2kPP1/n1P3P1/3PP2r/2K3N1/b7 w - - 0 1)

Holler, Werner

Augsburger Allgemeine Zeitung, 2019

8/Q3p3/3pp3/1p2kPP1/n1P3P1/3PP2r/2K3N1/b7

#2

9 + 8

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe3
      • 2.Qxe3#
    • 1...Bd4
      • 2.Qxd4#
      • 2.exd4#
    • 1...Sb2
      • 2.Qd4#
    • 1...Sc3
      • 2.Qd4#
    • 1...Sc5
      • 2.Qxa1#
    • 1...Sb6
      • 2.Qxa1#
    • 1...d5
      • 2.Qb8#
      • 2.Qc7#
    • 1...exf5
      • 2.Qxe7#
  • Tries
    • 1.Qxe7?
      • threat
        • 2.Qf6#
        • 2.Qxe6#
        • 2.Qg7#
      • 1...Rxe3
        • 2.Qf6#
        • 2.Qg7#
      • 1...bxc4
        • 2.Qxe6#
      • 1...Rh7
        • 2.Qf6#
        • 2.Qxe6#
      • 1...Sc5
        • 2.Qf6#
        • 2.Qg7#
      • 1...d5
        • 2.Qxe6#
        • 2.Qc7#
      • 1...Rh6!
    • 1.d4+?
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Ke4!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qe4#
      • 1...Rxe3
        • 2.Qh8#
      • 1...exf5
        • 2.Qd5#
      • 1...d5
        • 2.Qb8#
      • 1...Sc3
        • 2.d4#
      • 1...Sc5
        • 2.Qxa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(b);OGATE,XP(D)::QAR2(I),XR(b)
    • S(c);S_CUTB(a)::QAB1(I)
    • S(c);OGATE::QAB(I),XB(a)
    • P(g);OGATEB,XP(G)::QAR2(I),XP(h)
  • Tries
    • Try
      • Q(I);P_PINP(g),XP(h)
      • Threat
        • DUALS(3)
      • Vars
        • P(d);XP(E)::QAR1(I),XP(g)
      • Refutation
        • R(b);
    • Try
      • P(C);CHECK
      • Vars
        • B(a);OGATE,XP(C)::QAB1(I),XB(a)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • R(b);N_GUARD,XP(D)::QAB(I)
      • P(g);N_GUARD,XP(G)::QAR1(I)
      • P(f);OGATEB::QAB(I)
      • S(c);S_CUTB(a)::P(C)
      • S(c);OGATE::QAB(I),XB(a)
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