MESON Chess Problem Database

Problem Display
PID: 107082 (4Q2K/B6p/3Np2r/n1Pk4/3P1R2/b2Rn3/4P3/2q5 w - - 0 1)

Grabowski, Kazimierz

Teplitz-Schonauer Anzeiger, 1921

4Q2K/B6p/3Np2r/n1Pk4/3P1R2/b2Rn3/4P3/2q5

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.e4#
    • 1...Sf1
      • 2.e4#
    • 1...Sc2
      • 2.e4#
    • 1...Sg2
      • 2.e4#
    • 1...Sec4
      • 2.e4#
    • 1...Sg4
      • 2.e4#
    • 1...Sf5
      • 2.e4#
    • 1...Sb3
      • 2.Qa8#
    • 1...Sac4
      • 2.Qa8#
    • 1...e5
      • 2.dxe5#
  • Tries
    • 1.Rf5+?
      • 1...Sxf5
        • 2.e4#
      • 1...e5
        • 2.Rxe5#
        • 2.dxe5#
      • 1...exf5!
    • 1.Qa8+?
      • 1...Sb7
        • 2.Qxb7#
      • 1...Sc6!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Sb6#
      • 1...Kxc4
        • 2.d5#
      • 1...Qxc4
        • 2.Qd7#
      • 1...Bxc5
        • 2.dxc5#
      • 1...Sexc4
        • 2.e4#
      • 1...Saxc4
        • 2.Qa8#
      • 1...Qb2
        • 2.Sxe3#
      • 1...Qb1
        • 2.Sxe3#
      • 1...e5
        • 2.dxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • S(c);OGATE::P(A)
    • S(d);N_GUARD::QAB(H)
    • P(f);OGATE::R(B)+P(C),XP(f)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • S(c);OGATE,XR(D)::P(A)
      • Refutation
        • P(f);XR(D)
    • Try
      • Q(H);CHECK
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB(H),XS(d)
      • Refutation
        • S(d);P_SPINS(d)
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • K(e);OGATE,S_FLIGHT,XS(F)::R(D)+P(C)
      • Q(a);SBLOCK,XS(F)::QAR2(H)
      • B(b);OGATE,XP(E)::R(B)+P(C),XB(b)
      • S(c);OGATE,SBLOCK,XS(F)::P(A)
      • S(d);N_GUARD,SBLOCK,XS(F)::QAB(H)
      • Q(a);N_GUARD,P_PINP(C)::S(F),XS(c)
      • Q(a);N_GUARD::S(F),XS(c)
      • P(f);OGATE::R(B)+P(C),XP(f)
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