MESON Chess Problem Database

Problem Display
PID: 88717 (8/8/8/7K/4pk2/4R1R1/Q2N4/8 w - - 0 1)

Lebedev, Leonid Arsentevich

Uralski Problemist, 2000

8/8/8/7K/4pk2/4R1R1/Q2N4/8

#2

5 + 2

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Rxe4+?
      • 1...Kf5
        • 2.Rf3#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Kxg3!
  • Keys
    • 1.Sf3!
      • 1...Kxe3
        • 2.Qd2#
      • 1...Kxg3
        • 2.Qh2#
      • 1...Kf5
        • 2.Qf7#
      • 1...exf3
        • 2.Rgxf3#

Anticipated by 102049(1882), 96826(1945), 98485(1963), 187098(1994-1995)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK,XP(a)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
  • Actual
    • S(B);
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(C)::QAB1(A)
      • K(b);OGATEB,S_FLIGHT,XR(D)::QAB1(A)
      • K(b);P-FLIGHT::QAR2(A)
      • P(a);OGATE,XS(B)::R1(D),XP(a)
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