MESON Chess Problem Database

Problem Display
PID: 175576 (4Q3/3nK3/3p1P2/5R2/3pk2P/7q/3PBP1B/8 w - - 0 1)

Schiffer, Vincenz

La Strategie, 1900

4Q3/3nK3/3p1P2/5R2/3pk2P/7q/3PBP1B/8

#2

9 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sxf6
      • 2.Kxf6#
  • Tries
    • 1.Kxd6+?
      • 1...Se5
        • 2.Rf4#
        • 2.Rxe5#
        • 2.Qxe5#
      • 1...Kxf5!
    • 1.Kf7+?
      • 1...Kxf5
        • 2.Qe6#
      • 1...Se5+!
    • 1.Qf7?
      • threat
        • 2.Qd5#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Qxf5
        • 2.d3#
      • 1...Sxf6
        • 2.Qe6#
      • 1...Se5
        • 2.Rf4#
      • 1...Sb6
        • 2.Qe6#
      • 1...d5
        • 2.Qxd5#
      • 1...Qb3!
    • 1.Qa8+?
      • 1...d5
        • 2.Qxd5#
      • 1...Kxf5!
    • 1.d3+?
      • 1...Kxf5
        • 2.Qh5#
      • 1...Qxd3!
    • 1.f3+?
      • 1...Kxf5
        • 2.Bd3#
        • 2.Qh5#
      • 1...Qxf3!
  • Keys
    • 1.Qg8!
      • threat
        • 2.Qd5#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Qxf5
        • 2.d3#
      • 1...Sxf6
        • 2.Qe6#
      • 1...Qb3
        • 2.Qg4#
      • 1...Se5
        • 2.Rf4#
      • 1...Sb6
        • 2.Qe6#
      • 1...d5
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(e);XP(G)::QAR(I)+K(H),XS(e)
  • Tries
    • Try
      • K(H);CHECK,S_FLIGHT,XP(d)
      • Refutation
        • K(c);S_FLIGHT,XR(F)
    • Try
      • K(H);CHECK,P-FLIGHT
      • Vars
        • K(c);S_FLIGHT,XR(F)::QAB1(I)
      • Refutation
        • S(e);CHECK,P_SPINS(e)
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XR(F)::QAB(I)
        • Q(a);N_GUARD,SBLOCK,XR(F)::P(A)
        • S(e);N_GUARD,XP(G)::QAR2(I)
        • S(e);SBLOCK::R1(F)
        • S(e);N_GUARD::QAR2(I)
        • P(d);::QAB1(I),XP(d)
      • Refutation
        • Q(a);
    • Try
      • Q(I);CHECK
      • Vars
        • P(d);P_SPINP(d)::QAB1(I),XP(d)
      • Refutation
        • K(c);S_FLIGHT,XR(F)
    • Try
      • P(A);CHECK
      • Vars
        • K(c);S_FLIGHT,XR(F)::QAR2(I)
      • Refutation
        • Q(a);XP(A)
    • Try
      • P(C);CHECK
      • Refutation
        • Q(a);XP(C)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(F)::QAB(I)
      • Q(a);N_GUARD,SBLOCK,XR(F)::P(A)
      • S(e);N_GUARD,XP(G)::QAR2(I)
      • Q(a);N_GUARD::QAR2(I)
      • S(e);SBLOCK::R1(F)
      • S(e);N_GUARD::QAR2(I)
      • P(d);::QAB1(I),XP(d)
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