MESON Chess Problem Database

Problem Display
PID: 245378 (2K5/b3PR2/2p1p3/3PP3/pP1kp1b1/3pN3/1P1N1Q1B/2r5 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Schach, 1983

2K5/b3PR2/2p1p3/3PP3/pP1kp1b1/3pN3/1P1N1Q1B/2r5

#2

11 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...a3
      • 2.Sb3#
    • 1...cxd5+
      • 2.Sc2#
    • 1...exd5+
      • 2.Sf5#
  • Tries
    • 1.Sxg4+?
      • 1...Kxd5
        • 2.Sf6#
      • 1...e3!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Rxe4#
      • 1...cxd5+
        • 2.Sec4#
      • 1...exd5+
        • 2.Sxg4#
      • 1...Kxe5
        • 2.Rxe4#
      • 1...Bf3
        • 2.Sxf3#
      • 1...Bf5
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(c);N_GUARD::S(B)
    • P(g);CHECK,SBLOCK,XP(G)::QAB(C)+S(E),DCHECK
    • P(h);CHECK,SBLOCK,XP(G)::QAB(C)+S(E),DCHECK
  • Tries
    • Try
      • S(E);CHECK,XB(f)
      • Vars
        • K(d);P-FLIGHT,XP(G)::S(E)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • R(J);P_PINP(e)
    • Threat
      • R1(J),XP(e)
    • Vars
      • P(g);CHECK,SBLOCK,XP(G)::QAB(C)+S(E)
      • P(h);CHECK,SBLOCK,XP(G)::QAB(C)+S(E),XB(f)
      • K(d);N_SPINP(e),S_FLIGHT,XP(H)::B(D)+R(J),DCHECK,XP(e)
      • B(f);N_GUARD::S(B),XB(f)
      • B(f);N_GUARD::S(B)
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