MESON Chess Problem Database

Problem Display
PID: 92117 (n4QbK/3p4/4kNpN/r3p2n/2R5/5B2/8/6r1 w - - 0 1)

Wielgos, Oskar

Deutsche Schachzeitung, 1981

n4QbK/3p4/4kNpN/r3p2n/2R5/5B2/8/6r1

#2

6 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rga1
      • 2.Bg4#
    • 1...Rb1
      • 2.Bg4#
    • 1...Rc1
      • 2.Bg4#
    • 1...Rd1
      • 2.Bg4#
    • 1...Re1
      • 2.Bg4#
    • 1...Rh1
      • 2.Bg4#
    • 1...Rg4
      • 2.Bxg4#
    • 1...Raa1
      • 2.Bd5#
    • 1...Ra2
      • 2.Bd5#
    • 1...Ra3
      • 2.Bd5#
    • 1...Ra4
      • 2.Bd5#
    • 1...Rd5
      • 2.Bxd5#
    • 1...Ra6
      • 2.Bd5#
    • 1...Ra7
      • 2.Bd5#
    • 1...d5
      • 2.Rc6#
  • Tries
    • 1.Rc6+?
      • 1...d6
        • 2.Rxd6#
        • 2.Qxd6#
      • 1...dxc6!
    • 1.Qf7+?
      • 1...Kd6
        • 2.Se4#
        • 2.Se8#
        • 2.Qxd7#
      • 1...Bxf7!
    • 1.Qe8+?
      • 1...Kd6
        • 2.Qxd7#
      • 1...Kxf6!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qd6#
      • 1...Kd5
        • 2.Qxg8#
      • 1...d6
        • 2.Qxd6#
      • 1...Rd1
        • 2.Sg5#
      • 1...Rd5
        • 2.Qe8#
      • 1...Ra6
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 12
  • Sets
    • R(a);N_GUARD::B(A)
    • R(a);N_GUARD::B(A),XR(a)
    • R(b);N_GUARD::B(A)
    • R(b);N_GUARD::B(A),XR(b)
    • P(g);N_GUARD::R(B)
  • Tries
    • Try
      • R(B);CHECK
      • Refutation
        • P(g);XR(B)
    • Try
      • Q(E);CHECK
      • Refutation
        • B(i);XQ(E)
    • Try
      • Q(E);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(E),XP(g)
      • Refutation
        • K(e);P-FLIGHT,XS(C)
  • Actual
    • S(C);
    • Threat
      • QAR1(E)
    • Vars
      • K(e);S_FLIGHT::QAB(E),XB(i)
      • P(g);::QAR1(E),XP(g)
      • R(a);N_GUARD::S(C)
      • R(b);SBLOCK::QAR2(E)
      • R(b);N_GUARD::S(C)
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