MESON Chess Problem Database

Problem Display
PID: 268665 (8/2ppQ3/1n5R/1pNpR2p/3k1N2/1K3p2/1n6/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

The Macedonian Problemist, 2022

8/2ppQ3/1n5R/1pNpR2p/3k1N2/1K3p2/1n6/8

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sa4
      • 2.Rxd5#
    • 1...Sc4
      • 2.Rxd5#
    • 1...Sa8
      • 2.Rxd5#
    • 1...Sc8
      • 2.Rxd5#
    • 1...f2
      • 2.Se2#
  • Tries
    • 1.Sfd3?
      • threat
        • 2.Qh4#
      • 1...h4
        • 2.Rxh4#
        • 2.Qxh4#
      • 1...Sxd3!
    • 1.Sfe6+?
      • 1...Kxe5
        • 2.Rxh5#
      • 1...dxe6!
    • 1.Sxd7?
      • threat
        • 2.Qc5#
      • 1...Sxd7
        • 2.Rxd5#
      • 1...Sd3
        • 2.Se6#
      • 1...S6a4
        • 2.Rxd5#
      • 1...c5
        • 2.Qxc5#
      • 1...S2a4!
  • Keys
    • 1.Qh4!
      • threat
        • 2.Sfd3#
      • 1...Kxc5
        • 2.Qf2#
      • 1...Kxe5
        • 2.Qf6#
      • 1...Sd3
        • 2.Sfxd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • S(g);N_GUARD::R1(D),XP(e)
    • P(b);N_GUARD::S(B)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR(F)
      • Refutation
        • S(a);XS(B)
    • Try
      • S(B);CHECK
      • Vars
        • K(c);S_CUTP(i),S_FLIGHT,XR(D)::R(E),XP(f)
      • Refutation
        • P(i);XS(B)
    • Try
      • S(C);XP(i)
      • Threat
        • QAB1(F)
      • Vars
        • S(g);N_GUARD,XS(C)::R1(D),XP(e)
        • S(a);SBLOCK::S(B)
        • S(g);N_GUARD::R1(D),XP(e)
        • P(h);::QAB1(F),XP(h)
      • Refutation
        • S(a);
  • Actual
    • Q(F);
    • Threat
      • QAR(F)+S(B)
    • Vars
      • K(c);N_GUARD,P_SPINP(e),S_FLIGHT,XS(C)::QAB(F)
      • K(c);OGATEB,S_FLIGHT,XR(D)::QAB1(F)
      • S(a);::QAR(F)+S(B),XS(a)
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