MESON Chess Problem Database

Problem Display
PID: 200780 (7B/8/5R2/3pk1P1/1p2p3/8/5P2/K2Q4 w - - 0 1)

Sawionok, Aleksandr

Stuttgarter Nachrichten, 2001

(First published on Sat Sep 1 2001)

7B/8/5R2/3pk1P1/1p2p3/8/5P2/K2Q4

#2

6 + 4

16210 Problemschach-Jahrbuch (2001) 2002
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Qe2?
      • 1...Kd4
        • 2.Rc6#
      • 1...e3
        • 2.Qxe3#
      • 1...d4
        • 2.Qb5#
      • 1...b3!
    • 1.Qf3?
      • threat
        • 2.Ra6#
        • 2.Rb6#
        • 2.Rc6#
        • 2.Rg6#
        • 2.Rh6#
      • 1...Kd4
        • 2.Rc6#
      • 1...d4
        • 2.Qf5#
      • 1...exf3!
    • 1.Qg4?
      • threat
        • 2.Ra6#
        • 2.Rb6#
        • 2.Rc6#
        • 2.Re6#
        • 2.Rg6#
        • 2.Rh6#
      • 1...d4
        • 2.Qf5#
        • 2.Qe6#
      • 1...Kd4!
    • 1.Qc1?
      • 1...Kd4
        • 2.Rf3#
      • 1...e3
        • 2.Qxe3#
      • 1...d4
        • 2.Qc5#
      • 1...b3!
  • Keys
    • 1.Qb3!
      • 1...Kd4
        • 2.Rc6#
      • 1...e3
        • 2.Qxe3#
      • 1...d4
        • 2.Qe6#

Anticipated by 199514(2001)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(B);P_PINP(b)
      • Vars
        • K(d);N_SPINP(b),S_FLIGHT::B(F)+R(E)
        • P(b);OGATEB::QAR2(B),XP(b)
        • P(c);OGATEB,SBLOCK::QAR(B)
      • Refutation
        • P(a);
    • Try
      • Q(B);
      • Threat
        • DUALS(5)
      • Vars
        • K(d);S_FLIGHT::B(F)+R(E)
        • P(c);SBLOCK::QAR1(B)
      • Refutation
        • P(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • DUALS(6)
      • Refutation
        • K(d);P_SPINP(b),S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(d);S_FLIGHT::B(F)+R(E)
        • P(b);OGATEB::QAR2(B),XP(b)
        • P(c);OGATEB::QAR2(B)
      • Refutation
        • P(a);
  • Actual
    • Q(B);
    • Vars
      • K(d);S_FLIGHT::B(F)+R(E)
      • P(b);OGATEB::QAR2(B),XP(b)
      • P(c);OGATE,SBLOCK::QAR1(B)
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