MESON Chess Problem Database

Problem Display
PID: 200088 (8/1p2p3/1K2P3/1P3P2/p2k1PP1/P4p2/QP3P2/3B4 w - - 0 1)

Niemeijer, Meindert

The Problemist, 1982

8/1p2p3/1K2P3/1P3P2/p2k1PP1/P4p2/QP3P2/3B4

#2

11 + 5

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qd5#
    • 1...Ke4
      • 2.Qc4#
  • Tries
    • 1.Kxb7?
      • 1...Kd3
        • 2.Qd5#
      • 1...Ke4
        • 2.Qc4#
      • 1...Kc5!
    • 1.Be2?
      • threat
        • 2.Qc4#
      • 1...Ke4
        • 2.Qc4#
      • 1...fxe2!
    • 1.Bxa4?
      • 1...Ke4
        • 2.Qc4#
      • 1...Kd3!
    • 1.Qb3?
      • 1...Ke4
        • 2.Qc4#
      • 1...axb3!
    • 1.g5?
      • 1...Kd3
        • 2.Qd5#
      • 1...Ke4!
    • 1.f6?
      • 1...Kd3
        • 2.Qd5#
      • 1...Ke4
        • 2.Qc4#
      • 1...exf6!
  • Keys
    • 1.Qb1!
      • 1...Kc4
        • 2.Qe4#
      • 1...Kd5
        • 2.Qd3#

Anticipated by 68798(1956), 177917(1982)

FEATURES

  • Static
    • TYPE = WAITER
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(c);P-FLIGHT::QAR2(B)
  • Tries
    • Try
      • K(J);P-FLIGHT,XP(d)
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • B(A);
      • Threat
        • QAR1(B)
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
      • Refutation
        • P(a);XB(A)
    • Try
      • B(A);XP(b)
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
      • Refutation
        • P(b);XQ(B)
    • Try
      • P(G);
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • P(I);
      • Vars
        • K(c);P-FLIGHT::QAR2(B)
      • Refutation
        • P(e);XP(I)
  • Actual
    • Q(B);
    • Vars
      • K(c);P-FLIGHT::QAR2(B)
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