MESON Chess Problem Database

Problem Display
PID: 265468 (3r4/1n4B1/4Q3/3p4/2PrN1p1/Pp1k2P1/3P2P1/3K4 w - - 0 1)

Kupper, Josef

Schweizerische Schachzeitung, 2015

3r4/1n4B1/4Q3/3p4/2PrN1p1/Pp1k2P1/3P2P1/3K4

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc4
      • 2.Qa6#
    • 1...Rxc4
      • 2.Sf2#
    • 1...dxc4
      • 2.Sf2#
  • Tries
    • 1.Sc5+?
      • 1...Sxc5
        • 2.Qe2#
      • 1...Kxc4!
    • 1.Qb6?
      • threat
        • 2.Qxd4#
      • 1...Kxc4
        • 2.Qa6#
      • 1...Kxe4
        • 2.Qg6#
      • 1...Rxc4
        • 2.Sf2#
        • 2.Qe3#
      • 1...Rxe4
        • 2.Qxb3#
      • 1...dxc4
        • 2.Sf2#
      • 1...dxe4
        • 2.Qxb3#
      • 1...Sc5!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Qxd4#
      • 1...Kxc4
        • 2.Qa6#
      • 1...Kxe4
        • 2.Qg6#
      • 1...Rxc4
        • 2.Sf2#
      • 1...Rxe4
        • 2.Qc3#
      • 1...dxc4
        • 2.Sf2#
      • 1...dxe4
        • 2.Qf1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);OGATEB,P_PINP(B),P_SPINP(e),S_FLIGHT,XP(F)::QAB(H)
    • R(c);SBLOCK,XP(F)::S(G)
    • P(e);XP(F)::S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • S(f);XS(G)::QAB1(H)
      • Refutation
        • K(b);P_PINP(B),P_SPINP(e),S_FLIGHT,XP(F)
    • Try
      • Q(H);
      • Threat
        • QAR1(H),XR(c)
      • Vars
        • K(b);OGATEB,P_PINP(B),S_FLIGHT,XP(F)::QAB(H)
        • K(b);OGATEB,P_PINP(B),S_FLIGHT,XS(G)::QAB(H)
        • R(c);SBLOCK,XS(G)::QAR2(H),XP(a)
        • P(e);SBLOCK,XP(F)::S(G)
        • P(e);SBLOCK,XS(G)::QAR2(H),XP(a)
      • Refutation
        • S(f);
  • Actual
    • Q(H);
    • Threat
      • QAR1(H),XR(c)
    • Vars
      • K(b);OGATEB,P_PINP(B),S_FLIGHT,XP(F)::QAB(H)
      • K(b);OGATEB,P_PINP(B),S_FLIGHT,XS(G)::QAB(H)
      • R(c);SBLOCK,XP(F)::S(G)
      • R(c);OGATE,SBLOCK,XS(G)::QAR1(H)
      • P(e);SBLOCK,XP(F)::S(G)
      • P(e);SBLOCK,XS(G)::QAB(H)
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