MESON Chess Problem Database

Problem Display
PID: 245406 (1N6/3RKp2/1p4Rp/4k3/1r6/2PB2P1/1r1N1P2/7b w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Revista Romana de Sah, 1987

1N6/3RKp2/1p4Rp/4k3/1r6/2PB2P1/1r1N1P2/7b

#2

9 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb3
      • 2.Sc4#
      • 2.f4#
    • 1...Rc4
      • 2.Sxc4#
    • 1...Rd4
      • 2.cxd4#
    • 1...Rb5
      • 2.Sc4#
      • 2.f4#
    • 1...Bf3
      • 2.Sxf3#
    • 1...Bc6
      • 2.Sxc6#
    • 1...f5
      • 2.Re6#
  • Tries
    • 1.Rg5+?
      • 1...f5
        • 2.Rxf5#
      • 1...hxg5!
    • 1.Rd5+?
      • 1...Bxd5
        • 2.Sd7#
      • 1...Kxd5!
    • 1.f3?
      • threat
        • 2.Sc6#
      • 1...Bxf3
        • 2.Sxf3#
      • 1...Rc4
        • 2.Sxc4#
      • 1...Re4!
    • 1.c4?
      • threat
        • 2.f4#
      • 1...Rxc4
        • 2.Sxc4#
      • 1...Bd5
        • 2.Rxd5#
      • 1...Bf3
        • 2.Sxf3#
      • 1...Be4!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Rf5#
      • 1...Re4
        • 2.Sc6#
      • 1...Rf4
        • 2.gxf4#
      • 1...Be4
        • 2.f4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • R(c);N_GUARD::S(A),XR(c)
    • R(c);OGATE::P(C),XR(c)
    • B(a);N_GUARD::S(A),XB(a)
    • B(a);N_GUARD::S(I),XB(a)
    • P(g);N_GUARD::R1(F)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • P(g);P_SPINP(g)::R1(F),XP(g)
      • Refutation
        • P(f);XR(F)
    • Try
      • R(G);CHECK
      • Vars
        • B(a);SBLOCK,XR(G)::S(I)
      • Refutation
        • K(d);P-FLIGHT,XR(G)
    • Try
      • P(B);
      • Threat
        • S(I)
      • Vars
        • B(a);XP(B)::S(A),XB(a)
        • R(c);N_GUARD::S(A),XR(c)
      • Refutation
        • R(c);
    • Try
      • P(C);
      • Threat
        • P(B)
      • Vars
        • R(c);XP(C)::S(A),XR(c)
        • B(a);N_GUARD::R1(G),XB(a)
        • B(a);N_GUARD::S(A),XB(a)
      • Refutation
        • B(a);
  • Actual
    • R(F);
    • Threat
      • R1(F)
    • Vars
      • R(c);S_CUTB(a)::S(I)
      • R(c);OGATE::P(E),XR(c)
      • B(a);S_CUTR(c)::P(B)
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