MESON Chess Problem Database

Problem Display
PID: 249861 (r3k2r/1R6/4PP2/nb6/4Q3/8/7B/4K3 w kq - 0 1)

Tyunin, Aleksandr Dmitrevich

Schach-Aktiv, 1994

r3k2r/1R6/4PP2/nb6/4Q3/8/7B/4K3

#2

6 + 5

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Rb8#
    • 1...Ra7
      • 2.Rb8#
    • 1...Rb8
      • 2.Rxb8#
    • 1...0-0
      • 2.Qh7#
    • 1...0-0-0
      • 2.Rb8#
  • Tries
    • 1.Re7+?
      • 1...Kd8
        • 2.Qxa8#
      • 1...Kf8!
    • 1.Qg6+?
      • 1...Kf8
        • 2.Bd6#
        • 2.Qf7#
        • 2.e7#
      • 1...Kd8!
  • Keys
    • 1.Rh7!
      • threat
        • 2.Rxh8#
        • 2.Qxa8#
      • 1...Kd8
        • 2.Qxa8#
      • 1...Kf8
        • 2.Rxh8#
      • 1...0-0
        • 2.Qg6#
      • 1...0-0-0
        • 2.Qa8#
      • 1...Rxh7
        • 2.Qxa8#
      • 1...Ra6
        • 2.Rxh8#
      • 1...Ra7
        • 2.Rxh8#
      • 1...Rb8
        • 2.Rxh8#
      • 1...Rc8
        • 2.Rxh8#
      • 1...Rd8
        • 2.Rxh8#
      • 1...Rf8
        • 2.Qxa8#
      • 1...Rg8
        • 2.Qxa8#
      • 1...Ba6
        • 2.Rxh8#
      • 1...Bc6
        • 2.Rxh8#
      • 1...Bd7
        • 2.Rxh8#
      • 1...Sc6
        • 2.Rxh8#
      • 1...Sb7
        • 2.Rxh8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD::R(F)
    • R(c);N_GUARD::R(F),XR(c)
    • K(d);0-0,OGATEB::QAB1(C)
    • K(d);0-0-0,S_CUTR(c)::R1(F)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(d);P-FLIGHT::QAR(C),XR(c)
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • Q(C);CHECK
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • R(F);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);P-FLIGHT::QAR(C),XR(c)
      • K(d);P-FLIGHT::R(F),XR(e)
      • K(d);0-0,N_GUARD::QAR2(C)
      • K(d);0-0-0::QAR2(C)
      • R(e);XR(F)::QAR(C),XR(c)
      • R(c);::R(F),XR(e)
      • R(c);SBLOCK::R(F),XR(e)
      • R(e);SBLOCK::QAR(C),XR(c)
      • R(e);::QAR(C),XR(c)
      • B(b);::R(F),XR(e)
      • S(a);::R(F),XR(e)
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