MESON Chess Problem Database

Problem Display
PID: 195735 (3Q2K1/2p5/4k3/2r3p1/3bB3/4pN2/8/5R2 w - - 0 1)

Stojnic, Dragan

Sachsische Zeitung, 2001

(First published on Sat Oct 13 2001)

3Q2K1/2p5/4k3/2r3p1/3bB3/4pN2/8/5R2

#2

5 + 6

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

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sxd4#
    • 1...Be5
      • 2.Sxg5#
  • Tries
    • 1.Sxg5+?
      • 1...Ke5
        • 2.Rf5#
        • 2.Qf6#
        • 2.Qe7#
      • 1...Rxg5+!
    • 1.Bd5+?
      • 1...Kf5
        • 2.Qxg5#
      • 1...Rxd5!
    • 1.Qd7+?
      • 1...Kf6
        • 2.Qf7#
      • 1...Kxd7!
    • 1.Qe8+?
      • 1...Kf6
        • 2.Se5#
        • 2.Qf7#
      • 1...Kd6!
  • Keys
    • 1.Se5!
      • threat
        • 2.Qf6#
      • 1...Kxe5
        • 2.Qe7#
      • 1...Rxe5
        • 2.Rf6#
      • 1...Bxe5
        • 2.Bf5#

Anticipated by 103606(1963)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);SBLOCK::S(B),XB(b)
    • B(b);SBLOCK,S_CUTR(c)::S(B),XP(d)
  • Tries
    • Try
      • S(B);CHECK,XP(d)
      • Refutation
        • R(c);CHECK,XS(B)
    • Try
      • B(C);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR1(D),XP(d)
      • Refutation
        • R(c);XB(C)
    • Try
      • Q(D);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR1(D)
      • Refutation
        • K(e);S_FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR1(D)
    • Vars
      • K(e);P-FLIGHT,XS(B)::QAR2(D)
      • R(c);SBLOCK,XS(B)::R1(A)
      • B(b);SBLOCK,XS(B)::B(C)
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