MESON Chess Problem Database

Problem Display
PID: 233472 (8/5K2/8/3PPkpB/3P4/5p1N/2b2B2/5Q2 w - - 0 1)

Rosenthal, Moisej Schlemowitsch

Freie Presse, 1969

8/5K2/8/3PPkpB/3P4/5p1N/2b2B2/5Q2

#2

8 + 4

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qxb1#
    • 1...Bd1
      • 2.Qd3#
    • 1...Bb3
      • 2.Qd3#
    • 1...Bd3
      • 2.Qxd3#
    • 1...Ba4
      • 2.Qd3#
    • 1...g4
      • 2.Bg6#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Bg6#
        • 2.Qxf3#
        • 2.Qg4#
      • 1...Ke4
        • 2.Qxf3#
      • 1...Be4
        • 2.Bg4#
        • 2.Bg6#
        • 2.Qg4#
        • 2.Qxg5#
      • 1...Bd1
        • 2.Bg6#
        • 2.Qg4#
      • 1...g4
        • 2.Bg6#
        • 2.Qxg4#
      • 1...fxg2!
    • 1.Qc4?
      • threat
        • 2.Qxc2#
      • 1...Ke4
        • 2.Bg6#
      • 1...Be4
        • 2.Qc8#
      • 1...Bd1
        • 2.Qd3#
      • 1...Bb3
        • 2.Qd3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Ba4
        • 2.Qd3#
      • 1...Bb1!
    • 1.Qg1?
      • threat
        • 2.Bg6#
        • 2.Qg4#
      • 1...g4
        • 2.Bg6#
        • 2.Qxg4#
      • 1...Ke4!
  • Keys
    • 1.Qb5!
      • 1...Ke4
        • 2.Bg6#
      • 1...Be4
        • 2.Qd7#
      • 1...Bb1
        • 2.Qxb1#
      • 1...Bd1
        • 2.Qd3#
      • 1...Bb3
        • 2.Qd3#
      • 1...Bd3
        • 2.Qxd3#
      • 1...Ba4
        • 2.Qd3#
      • 1...g4
        • 2.Bg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(a);OGATEB::QAB(A),XB(a)
    • B(a);N_GUARD::QAB(A)
    • B(a);N_GUARD,P_PINP(E)::QAB(A)
    • B(a);N_GUARD::QAB(A),XB(a)
    • P(d);SBLOCK::B(G)
  • Tries
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Vars
        • K(c);P_SPINP(b),S_FLIGHT::QAB1(A),XP(b)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);
      • Threat
        • QAB(A),XB(a)
      • Vars
        • K(c);S_FLIGHT::B(G)
        • B(a);SBLOCK::QAB(A)
        • B(a);N_GUARD::QAB(A)
        • B(a);N_GUARD::QAB(A),XB(a)
      • Refutation
        • B(a);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(c);S_FLIGHT::B(G)
      • B(a);SBLOCK::QAB(A)
      • B(a);OGATEB::QAB(A),XB(a)
      • B(a);N_GUARD::QAB(A)
      • B(a);N_GUARD,P_PINP(E)::QAB(A)
      • B(a);N_GUARD::QAB(A),XB(a)
      • P(d);SBLOCK::B(G)
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