MESON Chess Problem Database

Problem Display
PID: 215708 (3R4/2q1B3/B2N4/P3pQ2/3kP3/5PK1/1P6/8 w - - 0 1)

Plachutta, Josef

Oesterreichische Lesehalle, 1881

3R4/2q1B3/B2N4/P3pQ2/3kP3/5PK1/1P6/8

#2

10 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sc4#
    • 1...Qc2
      • 2.Sc4#
    • 1...Qc3
      • 2.Sc4#
    • 1...Qc4
      • 2.Sxc4#
  • Tries
    • 1.Sb5+?
      • 1...Kc4
        • 2.Sd4#
        • 2.Qe6#
        • 2.Qf7#
      • 1...Ke3!
    • 1.Sb7+?
      • 1...Ke3
        • 2.Bg5#
        • 2.Qg5#
      • 1...Qxd8
        • 2.Bc5#
      • 1...Qd7
        • 2.Bc5#
      • 1...Qd6!
    • 1.Qc8?
      • threat
        • 2.Sf5#
      • 1...Ke3
        • 2.Sf5#
      • 1...Qxd6
        • 2.Qc3#
      • 1...Kc5!
    • 1.Qxe5+?
      • 1...Ke3
        • 2.Sf5#
        • 2.Bg5#
      • 1...Kxe5!
  • Keys
    • 1.Qd7!
      • threat
        • 2.Sf5#
      • 1...Ke3
        • 2.Sf5#
      • 1...Kc5
        • 2.Sb7#
      • 1...Qxd6
        • 2.Qa7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_GUARD::R(J)+S(H)
    • Q(c);N_GUARD,P_PINP(B)::R(J)+S(H)
    • Q(c);N_GUARD::R(J)+S(H),XQ(c)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • Q(c);XR(J)::B(I)
        • Q(c);P_SPINQ(c)::B(I)
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • Q(F);
      • Threat
        • R(J)+S(H),DCHECK
      • Vars
        • K(a);S_FLIGHT::S(H)
        • Q(c);OGATE,P_SPINQ(c),XS(H)::QAB1(F)
      • Refutation
        • K(a);P_SPINQ(c),S_FLIGHT
    • Try
      • Q(F);CHECK,XP(b)
      • Refutation
        • K(a);S_FLIGHT,XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAR(F)+S(H),DCHECK
    • Vars
      • K(a);S_FLIGHT::S(H)
      • K(a);S_FLIGHT::B(I)+S(H),DCHECK
      • Q(c);OGATE,P_SPINQ(c),XS(H)::QAB(F)
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