MESON Chess Problem Database

Problem Display
PID: 232299 (3R3B/1P3PR1/2pNp2p/3k3K/2p1p3/2P1P3/3P4/3Q4 w - - 0 1)

Bikov, Nikolai Aleksandrovich

Freie Presse, 1973

3R3B/1P3PR1/2pNp2p/3k3K/2p1p3/2P1P3/3P4/3Q4

#2

11 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Rg5#
  • Tries
    • 1.Sb5+?
      • 1...Ke5
        • 2.Rg5#
      • 1...Kc5!
    • 1.Sf5+?
      • 1...Ke5
        • 2.Rg5#
      • 1...Kc5!
    • 1.Sc8+?
      • 1...Ke5
        • 2.Rg5#
      • 1...Kc5!
    • 1.Se8+?
      • 1...Ke5
        • 2.Rg5#
      • 1...Kc5!
    • 1.Rg5+?
      • 1...e5
        • 2.Rxe5#
      • 1...hxg5!
    • 1.Qg4?
      • 1...Ke5
        • 2.Rg5#
      • 1...c5
        • 2.Qxe4#
      • 1...e5
        • 2.Sxe4#
      • 1...Kc5!
    • 1.Qb1?
      • 1...Kc5
        • 2.Sxe4#
      • 1...Ke5
        • 2.Rg5#
      • 1...c5
        • 2.Qxe4#
      • 1...e5!
  • Keys
    • 1.Qa4!
      • 1...Kc5
        • 2.Qa5#
      • 1...Ke5
        • 2.Rg5#
      • 1...c5
        • 2.Sxc4#
      • 1...e5
        • 2.Qxc4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(c);P-FLIGHT::B(K)+R(I),DCHECK
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT::B(K)+R(I),DCHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT::B(K)+R(I)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT::B(K)+R(I),DCHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • K(c);P-FLIGHT::B(K)+R(I),DCHECK
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • R(I);CHECK
      • Vars
        • P(e);P_SPINP(e)::R1(I),XP(e)
      • Refutation
        • P(f);XR(I)
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::B(K)+R(I),DCHECK
        • P(d);SBLOCK::QAB1(A),XP(b)
        • P(e);SBLOCK::R(J)+S(F),XP(b)
      • Refutation
        • K(c);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(c);P-FLIGHT::S(F),XP(b)
        • K(c);P-FLIGHT::B(K)+R(I),DCHECK
        • P(d);SBLOCK::QAB1(A),XP(b)
      • Refutation
        • P(e);
  • Actual
    • Q(A);
    • Vars
      • K(c);P-FLIGHT::QAR2(A)
      • K(c);P-FLIGHT::B(K)+R(I),DCHECK
      • P(d);SBLOCK::R(J)+S(F),XP(a)
      • P(e);SBLOCK::QAB1(A),XP(a)
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