MESON Chess Problem Database

Problem Display
PID: 245376 (B7/1nNpn3/1r1p1pb1/pPp1kp2/4Np2/5Q2/8/K5B1 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Revista Romana de Sah, 1983

B7/1nNpn3/1r1p1pb1/pPp1kp2/4Np2/5Q2/8/K5B1

#2

7 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sd8
      • 2.Qc3#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Sc4#
        • 2.Qe2#
        • 2.Qc3#
      • 1...Bh5
        • 2.Sc4#
        • 2.Qc3#
      • 1...Bf7
        • 2.Qe2#
        • 2.Qc3#
      • 1...Sd5
        • 2.Sc4#
        • 2.Qxd5#
      • 1...Sc6
        • 2.Sc4#
        • 2.Qe2#
        • 2.Qd5#
      • 1...c4
        • 2.Sxc4#
        • 2.Qe2#
        • 2.Qc3#
      • 1...d5!
    • 1.Sg3?
      • threat
        • 2.Qe2#
        • 2.Qc3#
      • 1...fxg3
        • 2.Qe3#
      • 1...Bh5
        • 2.Qc3#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sc6
        • 2.Qe2#
        • 2.Qd5#
      • 1...d5!
  • Keys
    • 1.Sxd6!
      • threat
        • 2.Sc4#
      • 1...Kxd6
        • 2.Qxf4#
      • 1...Rxd6
        • 2.Qe2#
      • 1...Sxd6
        • 2.Qc3#
      • 1...Bf7
        • 2.Sxf7#
      • 1...c4
        • 2.Sxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 1
  • Sets
    • S(j);::QAB(C)
  • Tries
    • Try
      • S(D);
      • Threat
        • DUALS(3)
      • Refutation
        • P(g);
    • Try
      • S(D);
      • Threat
        • DUALS(2)
      • Vars
        • P(a);N_GUARD,XS(D)::QAR2(C)
        • B(i);::QAB(C)
        • S(l);N_GUARD::QAR1(C),XS(l)
      • Refutation
        • P(g);
  • Actual
    • S(D);XP(g)
    • Threat
      • S(D)
    • Vars
      • K(d);S_FLIGHT,XS(D)::QAB(C),XP(a)
      • R(f);SBLOCK,XS(D)::QAR(C)
      • S(j);SBLOCK,XS(D)::QAB(C)
      • B(i);N_GUARD::S(D),XB(i)
      • P(c);::S(D),XP(c)
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