MESON Chess Problem Database

Problem Display
PID: 242239 (7B/4R3/6rp/5rkN/7N/2Q3pK/8/3B1n2 w - - 0 1)

Kisis, Imants J

Shakhmaty (Riga), 1975

7B/4R3/6rp/5rkN/7N/2Q3pK/8/3B1n2

#2

7 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Qxa5#
    • 1...Rc5
      • 2.Qxc5#
    • 1...Re5
      • 2.Rxe5#
      • 2.Qxe5#
    • 1...Rg7
      • 2.Rxg7#
      • 2.Qxg7#
    • 1...Sd2
      • 2.Qxg3#
  • Tries
    • 1.Rg7?
      • threat
        • 2.Rxg6#
      • 1...Rxg7
        • 2.Qxg7#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Rf3!
    • 1.Qe5?
      • threat
        • 2.Qxf5#
      • 1...Rxe5
        • 2.Rxe5#
      • 1...Rf6
        • 2.Bxf6#
      • 1...Se3!
    • 1.Qg7?
      • threat
        • 2.Qxg6#
      • 1...Rxg7
        • 2.Rxg7#
      • 1...Rf6!
    • 1.Qe3+?
      • 1...Rf4
        • 2.Re5#
        • 2.Qxf4#
      • 1...Sxe3!
  • Keys
    • 1.Re5!
      • threat
        • 2.Rxf5#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Rf6
        • 2.Bxf6#
      • 1...Se3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(c);OGATEB::QAR(B),XR(c)
    • S(a);N_GUARD::QAR2(B),XP(b)
  • Tries
    • Try
      • R(F);P_PINR(e)
      • Threat
        • R1(F),XR(e)
      • Vars
        • R(e);N_SPINR(e),OGATE,XR(F)::QAR2(B),XR(e)
        • R(c);N_GUARD::QAB1(B),XR(c)
      • Refutation
        • R(c);
    • Try
      • Q(B);P_PINR(c)
      • Threat
        • QAR1(B),XR(c)
      • Vars
        • R(c);N_SPINR(c),OGATE,XQ(B)::R(F),XR(c)
        • R(e);N_GUARD::B(G),XR(e)
      • Refutation
        • S(a);
    • Try
      • Q(B);P_PINR(e)
      • Threat
        • QAR1(B),XR(e)
      • Vars
        • R(e);N_SPINR(e),OGATE,XQ(B)::R(F),XR(e)
      • Refutation
        • R(c);
    • Try
      • Q(B);CHECK
      • Refutation
        • S(a);XQ(B)
  • Actual
    • R(F);P_PINR(c)
    • Threat
      • R1(F),XR(c)
    • Vars
      • R(c);N_SPINR(c),OGATE,XR(F)::QAR2(B),XR(c)
      • R(e);N_GUARD::B(G),XR(e)
      • S(a);N_GUARD::QAB(B),XS(a)
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