MESON Chess Problem Database

Problem Display
PID: 57236 (7B/1N4r1/6pq/1Q1P1P2/pK2kp1P/2PRNn1B/2p1b1P1/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Troll, 1996

7B/1N4r1/6pq/1Q1P1P2/pK2kp1P/2PRNn1B/2p1b1P1/8

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rc7
      • 2.Sd6#
    • 1...Rd7
      • 2.Sc5#
    • 1...Re7
      • 2.Sc5#
      • 2.Sd6#
    • 1...Rf7
      • 2.Sc5#
      • 2.Sd6#
    • 1...Rh7
      • 2.Sc5#
      • 2.Sd6#
    • 1...Rg8
      • 2.Sc5#
      • 2.Sd6#
    • 1...Se5
      • 2.Sc5#
      • 2.Sd6#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Sd6#
      • 1...Kxf5
        • 2.Sd6#
      • 1...Rxb7
        • 2.Sf2#
      • 1...gxf5
        • 2.Sc5#
      • 1...Rd7
        • 2.Sf2#
      • 1...g5!
    • 1.Qc4+?
      • 1...Sd4
        • 2.Qxd4#
      • 1...Ke5!
    • 1.Qe8+?
      • 1...Re7
        • 2.Sc5#
      • 1...Se5
        • 2.Sc5#
      • 1...Kxd3!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sc5#
      • 1...Kxd3
        • 2.Sc5#
      • 1...Rxb7
        • 2.Sd6#
      • 1...Bxd3
        • 2.Sbd6#
      • 1...Rc7
        • 2.Scd6#
      • 1...Sd4
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(i);::S(K)
  • Tries
    • Try
      • S(D);
      • Threat
        • S(K)
      • Vars
        • K(e);S_FLIGHT,XP(J)::S(K)
        • R(i);P_PINQ(H),XS(K)::S(D)
        • P(g);SBLOCK,XP(J)::S(K)
        • R(i);::S(D)
      • Refutation
        • P(g);
    • Try
      • Q(H);CHECK
      • Vars
        • S(c);N_GUARD,P_SPINS(c)::QAR1(H),XS(c)
      • Refutation
        • K(e);P-FLIGHT,P_SPINR(i)
    • Try
      • Q(H);CHECK
      • Vars
        • R(i);P_SPINR(i)::S(K)
        • S(c);P_SPINS(c)::S(K)
      • Refutation
        • K(e);S_FLIGHT,XR(C)
  • Actual
    • S(D);
    • Threat
      • S(K)
    • Vars
      • K(e);S_FLIGHT,XR(C)::S(K)
      • R(i);P_PINQ(H),XS(K)::S(D)
      • B(b);SBLOCK,XR(C)::S(K)
      • R(i);::S(D)
      • S(c);N_GUARD::R1(C),XS(c)
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