MESON Chess Problem Database

Problem Display
PID: 245371 (1RR3K1/6QB/3Pp3/2BkN3/5P2/2npp3/qr6/4r3 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Schach, 1982

1RR3K1/6QB/3Pp3/2BkN3/5P2/2npp3/qr6/4r3

#2

9 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rc2
      • 2.Qb7#
    • 1...Rd2
      • 2.Qb7#
    • 1...Re2
      • 2.Qb7#
    • 1...Rf2
      • 2.Qb7#
    • 1...Rh2
      • 2.Qb7#
    • 1...Rb7
      • 2.Qxb7#
    • 1...Se2
      • 2.Qg2#
    • 1...Sb5
      • 2.Qb7#
  • Tries
    • 1.Qg2+?
      • 1...Se4
        • 2.Bxe4#
        • 2.Qxe4#
      • 1...Rxg2+!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qd4#
      • 1...Kxc4
        • 2.Qd4#
      • 1...Qxc4
        • 2.Qe5#
      • 1...e5
        • 2.Qf7#
      • 1...Rg1
        • 2.Sxe3#
      • 1...Rg2
        • 2.Sb6#
      • 1...Se2
        • 2.Sxe3#
      • 1...Sb5
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • R(c);N_GUARD::QAB(E)
    • R(c);N_GUARD::QAB(E),XR(c)
    • S(d);N_GUARD,S_CUTR(c)::QAB(E)
    • S(d);S_CUTR(c)::QAB(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Refutation
        • R(c);CHECK,XQ(E)
  • Actual
    • S(C);
    • Threat
      • QAR1(E)
    • Vars
      • K(g);S_FLIGHT,XS(C)::QAR1(E)
      • Q(b);SBLOCK,XS(C)::QAR1(E)
      • P(h);OGATEB::QAB(E)
      • R(a);N_GUARD,P_PINQ(E)::S(C),XP(f)
      • R(c);N_GUARD,P_PINQ(E)::S(C)
      • S(d);S_CUTR(a)::S(C),XP(f)
      • S(d);S_CUTR(c)::S(C)
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