MESON Chess Problem Database

Problem Display
PID: 95354 (1R6/n7/8/kp6/pR2Q3/8/3K4/8 w - - 0 1)

Bitterli, Simon

National-Zeitung, 1950

1R6/n7/8/kp6/pR2Q3/8/3K4/8

#2

4 + 4

6490 yacpdb 2009
5454 Near Snap 2018

SOLUTION

  • SOUND
  • Tries
    • 1.R4xb5+?
      • 1...Ka6
        • 2.R8b6#
        • 2.Qb7#
        • 2.Qxa4#
      • 1...Sxb5!
    • 1.R8xb5+?
      • 1...Ka6
        • 2.Qb7#
      • 1...Sxb5!
  • Keys
    • 1.Qd3!
      • 1...Kxb4
        • 2.Qc3#
      • 1...Ka6
        • 2.Rxa4#
      • 1...Sc6
        • 2.Qxb5#
      • 1...Sc8
        • 2.Qxb5#
      • 1...a3
        • 2.Qxa3#

This anticipates 136047(1999)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(B);CHECK,XP(c)
      • Refutation
        • S(d);XR(B)
    • Try
      • R(D);CHECK,XP(c)
      • Vars
        • K(b);P-FLIGHT::QAB1(C)
      • Refutation
        • S(d);XR(D)
  • Actual
    • Q(C);
    • Vars
      • K(b);OGATEB,P_SPINP(c),S_FLIGHT,XR(B)::QAB1(C)
      • K(b);P-FLIGHT,P_SPINP(c)::R(B),XP(a)
      • S(d);N_GUARD::QAR1(C),XP(c)
      • P(a);OGATEB::QAR2(C),XP(a)
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