MESON Chess Problem Database

Problem Display
PID: 258840 (2B1K2n/8/1B3p2/4kP1p/3RNN1Q/rP1pp3/1b1n1r2/1b6 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

The Problemist, 2021

2B1K2n/8/1B3p2/4kP1p/3RNN1Q/rP1pp3/1b1n1r2/1b6

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf4
      • 2.Qxf6#
    • 1...Ba2
      • 2.Sxd3#
    • 1...Sxe4
      • 2.Rd5#
    • 1...Sg6
      • 2.Sxg6#
    • 1...Sf7
      • 2.Sg6#
  • Tries
    • 1.Sg3?
      • threat
        • 2.Rd5#
      • 1...Rxf4
        • 2.Qxf4#
      • 1...Bxd4
        • 2.Bc7#
      • 1...Ra5!
    • 1.Sxf6?
      • threat
        • 2.Rd5#
      • 1...Bxd4
        • 2.Bc7#
      • 1...Ra5!
    • 1.Se6?
      • threat
        • 2.Qxf6#
      • 1...Kxf5
        • 2.Qxh5#
      • 1...Rxf5
        • 2.Bc7#
      • 1...Sxe4
        • 2.Qxe4#
      • 1...Bxd4!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Rd5#
      • 1...Kxd4
        • 2.Qxf6#
      • 1...Rxf4
        • 2.Qxf4#
      • 1...Bxd4
        • 2.Bc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(d);SBLOCK,XS(D)::QAB1(E),XP(j)
    • B(a);N_GUARD::S(D),XP(f)
    • S(c);SBLOCK,XS(C)::R1(B)
    • S(k);N_GUARD::S(D),XS(k)
    • S(k);N_GUARD::S(D)
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(B)
      • Vars
        • R(d);OGATE,XS(D)::QAB1(E),XR(d)
        • B(b);SBLOCK,XR(B)::B(G)
      • Refutation
        • R(e);
    • Try
      • S(C);XP(j)
      • Threat
        • R1(B)
      • Vars
        • B(b);SBLOCK,XR(B)::B(G)
      • Refutation
        • R(e);
    • Try
      • S(D);
      • Threat
        • QAB1(E),XP(j)
      • Vars
        • K(h);OGATEB,P-FLIGHT,XP(F)::QAR2(E),XP(i)
        • R(d);SBLOCK,XP(F)::B(G)
        • S(c);OGATE,XS(C)::QAR1(E),XS(c)
      • Refutation
        • B(b);XR(B)
  • Actual
    • S(C);
    • Threat
      • R1(B)
    • Vars
      • K(h);N_GUARD,S_FLIGHT,XR(B)::QAB(E),XP(j)
      • R(d);OGATE,XS(D)::QAB1(E),XR(d)
      • B(b);SBLOCK,XR(B)::B(G)
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