MESON Chess Problem Database

Problem Display
PID: 235369 (b4R2/4B3/B7/1Q1p4/nP1k4/1p2N3/1P6/2K5 w - - 0 1)

Paslack, Rainer

Stern, 1969

b4R2/4B3/B7/1Q1p4/nP1k4/1p2N3/1P6/2K5

#2

8 + 5

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe3
      • 2.Qd3#
  • Tries
    • 1.Sc2+?
      • 1...Ke4
        • 2.Qe2#
      • 1...Ke5
        • 2.Qe2#
      • 1...bxc2!
    • 1.Bc5+?
      • 1...Ke4
        • 2.Qe8#
      • 1...Ke5
        • 2.Qe8#
      • 1...Sxc5!
    • 1.Qe2?
      • threat
        • 2.Sf5#
      • 1...Ke4
        • 2.Sc2#
      • 1...Ke5
        • 2.Sc2#
      • 1...Sxb2!
    • 1.Qxd5+?
      • 1...Kxe3
        • 2.Bg5#
        • 2.Rf3#
        • 2.Qd3#
      • 1...Bxd5!
  • Keys
    • 1.Qe8!
      • threat
        • 2.Bf6#
      • 1...Kxe3
        • 2.Bc5#
      • 1...Ke4
        • 2.Bc5#
      • 1...Ke5
        • 2.Bc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT,XS(C)::QAR1(E)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR2(E)
        • K(c);P_SPINP(d),S_FLIGHT::QAR(E)
      • Refutation
        • P(a);XS(C)
    • Try
      • B(G);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR(E)
        • K(c);S_FLIGHT::QAR(E)
      • Refutation
        • S(b);XB(G)
    • Try
      • Q(E);
      • Threat
        • S(C)
      • Vars
        • K(c);P-FLIGHT::QAR(E)+S(C)
        • K(c);S_FLIGHT::QAR(E)+S(C)
      • Refutation
        • S(b);XP(B)
    • Try
      • Q(E);CHECK,XP(d)
      • Refutation
        • B(e);XQ(E)
  • Actual
    • Q(E);
    • Threat
      • B(G)
    • Vars
      • K(c);S_FLIGHT,XS(C)::QAR(E)+B(G),DCHECK
      • K(c);P-FLIGHT::QAR(E)+B(G)
      • K(c);S_FLIGHT::QAR(E)+B(G)
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