MESON Chess Problem Database

Problem Display
PID: 91430 (1N1nK1B1/2BP1p2/6pp/3k4/1P2R3/1p1pP1N1/1nbr4/7Q w - - 0 1)

Nadezhdin, Nikolai Dmitrievich

Probleemblad, 1993

1N1nK1B1/2BP1p2/6pp/3k4/1P2R3/1p1pP1N1/1nbr4/7Q

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc4
      • 2.Re5#
    • 1...Sc6
      • 2.Bxf7#
    • 1...Se6
      • 2.Rd4#
    • 1...Sb7
      • 2.Bxf7#
  • Tries
    • 1.Sc6?
      • threat
        • 2.Se7#
      • 1...Sxc6
        • 2.Bxf7#
      • 1...Kxc6!
    • 1.Bxf7+?
      • 1...Se6
        • 2.Bxe6#
        • 2.Rd4#
        • 2.d8Q#
        • 2.d8R#
      • 1...Sxf7!
    • 1.Rf4+?
      • 1...Ke6
        • 2.Qe4#
      • 1...Rg2!
    • 1.Rg4+?
      • 1...Ke6
        • 2.Rxg6#
      • 1...Rg2!
    • 1.Qh3?
      • threat
        • 2.Rd4#
      • 1...Sc6
        • 2.Bxf7#
      • 1...Se6!
    • 1.Qh4?
      • threat
        • 2.Re5#
      • 1...Sc6
        • 2.Bxf7#
      • 1...Sc4!
  • Keys
    • 1.Qa1!
      • threat
        • 2.Qa5#
      • 1...Sa4
        • 2.Qd4#
        • 2.Qe5#
      • 1...Sc4
        • 2.Qd4#
      • 1...Sc6
        • 2.Bxf7#
      • 1...Se6
        • 2.Qa8#
      • 1...Sb7
        • 2.Bxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::QAB(A)+R(E),DCHECK
    • S(j);N_GUARD::B(J),XP(i)
    • S(j);N_SPINP(i),SBLOCK::QAB(A)+R(E),DCHECK
  • Tries
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • S(j);N_GUARD,SBLOCK,XS(H)::B(J),XP(i)
      • Refutation
        • K(f);N_SPINP(i),S_FLIGHT,XS(H)
    • Try
      • B(J);CHECK,XP(i)
      • Refutation
        • S(j);XB(J)
    • Try
      • R(E);CHECK
      • Vars
        • K(f);S_FLIGHT::QAR2(A)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • R(E);CHECK
      • Vars
        • K(f);S_FLIGHT::R(E),XP(g)
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • Q(A);
      • Threat
        • R1(E)
      • Vars
        • S(j);N_GUARD::B(J),XP(i)
      • Refutation
        • S(j);N_SPINP(i)
    • Try
      • Q(A);
      • Threat
        • R1(E)
      • Vars
        • S(j);N_GUARD::B(J),XP(i)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Threat
      • QAR(A)
    • Vars
      • S(a);OGATE::QAR1(A)
      • S(j);N_GUARD::B(J),XP(i)
      • S(j);N_GUARD,N_SPINP(i)::QAB(A)
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