MESON Chess Problem Database

Problem Display
PID: 151159 (8/5N2/1pKQ1Nr1/3p4/2kp3R/R2p1b2/4r1B1/8 w - - 0 1)

Aleksandrov, Rostislav Nikolaevich

Schackvarlden, 1936

8/5N2/1pKQ1Nr1/3p4/2kp3R/R2p1b2/4r1B1/8

#2

7 + 8

15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Ra2
      • 2.Se5#
    • 1...Rb2
      • 2.Se5#
    • 1...Rc2
      • 2.Se5#
    • 1...Rd2
      • 2.Se5#
    • 1...Rf2
      • 2.Se5#
    • 1...Rexg2
      • 2.Se5#
    • 1...Re5
      • 2.Sxe5#
    • 1...Be4
      • 2.Se5#
    • 1...Bg4
      • 2.Bxd5#
    • 1...Bh5
      • 2.Bxd5#
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Sxb6#
      • 1...Rb2
        • 2.Sde5#
        • 2.Sfe5#
      • 1...b5
        • 2.Sb6#
      • 1...Rxd6+!
  • Keys
    • 1.Sxd5!
      • threat
        • 2.Rc3#
      • 1...Rxd6+
        • 2.Sxd6#
      • 1...Bxd5+
        • 2.Bxd5#
      • 1...Rc2
        • 2.Se5#
      • 1...Re4
        • 2.Sxb6#
      • 1...Rg4
        • 2.Qb4#
      • 1...Be4
        • 2.Se5#
      • 1...Bg4
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(a);N_GUARD::S(G)
    • R(a);N_GUARD,XB(A)::S(G)
    • R(a);N_GUARD::S(G),XR(a)
    • B(c);N_SPINP(e),S_CUTR(a)::S(G)
    • B(c);N_SPINP(e),OGATE::B(A),XP(f)
    • B(c);OGATE::B(A),XP(f)
    • P(g);N_GUARD::QAR1(E)
  • Tries
    • Try
      • S(F);P_SPINQ(E)
      • Threat
        • S(F),XP(g)
      • Vars
        • P(g);::S(F)
      • Refutation
        • R(h);CHECK,XQ(E)
  • Actual
    • S(F);P_SPINQ(E),P_SPINS(F),XP(f)
    • Threat
      • R1(B)
    • Vars
      • R(h);CHECK,XQ(E)::S(G),XR(h)
      • B(c);CHECK,OGATE,XS(F)::B(A),XB(c)
      • R(a);N_GUARD::S(G)
      • R(a);N_PINS(F),N_SPINP(e)::S(F),XP(g)
      • R(h);N_PINQ(E),N_SPINP(e)::QAR1(E)
      • B(c);N_SPINP(e),S_CUTR(a)::S(G)
      • B(c);N_PINS(F),N_SPINP(e)::S(F),XP(g)
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