MESON Chess Problem Database

Problem Display
PID: 150644 (6Q1/5qb1/pp2Np1r/3R2p1/4k3/1K1pN1P1/1B3P2/3B4 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Die Schwalbe, 2013

6Q1/5qb1/pp2Np1r/3R2p1/4k3/1K1pN1P1/1B3P2/3B4

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe6
      • 2.Qxe6#
    • 1...b5
      • 2.Sc5#
    • 1...f5
      • 2.Sxg5#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Bf3#
      • 1...Qxd5+
        • 2.Qxd5#
      • 1...d2
        • 2.Bc2#
      • 1...Qh5
        • 2.Qe6#
      • 1...g4!
    • 1.Qc8?
      • threat
        • 2.Qc4#
      • 1...b5
        • 2.Sc5#
      • 1...f5
        • 2.Sxg5#
      • 1...Qc7!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Bf3#
      • 1...Qxe6+
        • 2.Qxe6#
      • 1...d2
        • 2.Bc2#
      • 1...Qh5
        • 2.Qa8#
      • 1...g4
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(h);OGATE,P_PINR(G),XS(H)::QAR2(I),XQ(h)
    • P(e);N_GUARD::S(H)
    • P(f);N_GUARD::S(H),XP(c)
  • Tries
    • Try
      • S(H);P_SPINR(G)
      • Threat
        • B(A)
      • Vars
        • Q(h);CHECK,OGATE,XR(G)::QAB1(I),XQ(h)
        • P(a);OGATEB::B(A)
        • Q(h);N_PINR(G),OGATE::QAR2(I)
      • Refutation
        • P(c);
    • Try
      • Q(I);
      • Threat
        • QAR2(I)
      • Vars
        • P(e);N_GUARD::S(H)
        • P(f);N_GUARD::S(H),XP(c)
      • Refutation
        • Q(h);
  • Actual
    • R(G);P_SPINS(H)
    • Threat
      • B(A)
    • Vars
      • Q(h);CHECK,OGATE,XS(H)::QAR2(I),XQ(h)
      • P(a);OGATEB::B(A)
      • Q(h);N_GUARD,N_PINS(H)::QAB(I)
      • P(c);N_GUARD::R1(G)
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Developed and maintained by Brian Stephenson.
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