MESON Chess Problem Database

Problem Display
PID: 242933 (2R5/3Q4/1N1NPP1b/rp4p1/3pP3/ppPkP3/3p4/1R1B2BK w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Schweizerische Schachzeitung, 1991

2R5/3Q4/1N1NPP1b/rp4p1/3pP3/ppPkP3/3p4/1R1B2BK

#2

13 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra6
      • 2.Qxb5#
    • 1...Ra7
      • 2.Qxb5#
    • 1...Ra8
      • 2.Qxb5#
  • Tries
    • 1.Sd5?
      • threat
        • 2.Sb4#
      • 1...b4
        • 2.Sxb4#
      • 1...Ra4!
    • 1.Rxb3?
      • threat
        • 2.cxd4#
        • 2.c4#
      • 1...dxc3
        • 2.Rbxc3#
        • 2.Rcxc3#
      • 1...dxe3!
    • 1.e5?
      • threat
        • 2.Qh7#
      • 1...Ra7
        • 2.Qxb5#
      • 1...Bg7!
  • Keys
    • 1.Sdc4!
      • threat
        • 2.Qxd4#
      • 1...Kxc3
        • 2.Rxb3#
      • 1...Kxe4
        • 2.Qh7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(f);N_GUARD::QAB(L),XP(g)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • P(g);::S(H),XP(g)
      • Refutation
        • R(f);
    • Try
      • R(A);XP(c)
      • Threat
        • DUALS(2)
      • Refutation
        • P(e);XP(F)
    • Try
      • P(G);
      • Threat
        • QAB(L)
      • Vars
        • R(f);N_GUARD::QAB(L),XP(g)
      • Refutation
        • B(i);
  • Actual
    • S(I);P_PINP(e)
    • Threat
      • QAR1(L),XP(e)
    • Vars
      • K(d);N_SPINP(e),OGATEB,P-FLIGHT,XP(E)::R1(A),XP(c)
      • K(d);N_SPINP(e),OGATEB,S_FLIGHT,XP(G)::QAB(L)
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