MESON Chess Problem Database

Problem Display
PID: 153104 (2B1n3/3R4/5pp1/2ppkP2/4P3/1bP3K1/2P1Q3/8 w - - 0 1)

Kupper, Josef

Schweizerische Schachzeitung, 2001

2B1n3/3R4/5pp1/2ppkP2/4P3/1bP3K1/2P1Q3/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc2
      • 2.Rxd5#
    • 1...Ba4
      • 2.Rxd5#
    • 1...Sd6
      • 2.Re7#
    • 1...c4
      • 2.Rxd5#
    • 1...gxf5
      • 2.exd5#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qf4#
      • 1...Kxe4
        • 2.Re7#
        • 2.Qf4#
      • 1...gxf5
        • 2.Qxf5#
      • 1...g5!
    • 1.Qf3?
      • threat
        • 2.Qf4#
      • 1...gxf5
        • 2.Qxf5#
      • 1...g5!
    • 1.Qg4?
      • threat
        • 2.Qf4#
      • 1...gxf5
        • 2.Qxf5#
      • 1...g5!
    • 1.Qf2?
      • threat
        • 2.Qf4#
      • 1...Kxe4
        • 2.Re7#
        • 2.Qf4#
      • 1...gxf5
        • 2.Qxf5#
      • 1...g5!
    • 1.Qh2?
      • threat
        • 2.Kf3#
      • 1...Kxe4
        • 2.Re7#
      • 1...dxe4
        • 2.Kg4#
      • 1...gxf5!
    • 1.Qe3?
      • threat
        • 2.Qf4#
      • 1...gxf5
        • 2.exd5#
      • 1...g5!
  • Keys
    • 1.Kf3!
      • threat
        • 2.Qh2#
      • 1...dxe4+
        • 2.Qxe4#
      • 1...gxf5
        • 2.exd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • B(a);N_GUARD,XP(A)::R1(G),XP(c)
    • B(a);N_GUARD::R1(G),XP(c)
    • S(g);SBLOCK::R(G)
    • P(b);S_CUTB(a)::R1(G),XP(c)
    • P(f);SBLOCK,XP(F)::QAR(B)+P(E),XP(c)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(f);OGATE,XP(F)::QAR1(B),XP(f)
      • Refutation
        • P(f);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(f);OGATE,XP(F)::QAR1(B),XP(f)
      • Refutation
        • P(f);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(f);OGATE,XP(F)::QAR1(B),XP(f)
      • Refutation
        • P(f);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(f);OGATE,XP(F)::QAR1(B),XP(f)
      • Refutation
        • P(f);
    • Try
      • Q(B);
      • Threat
        • QAB(B)+K(D)
      • Vars
        • K(d);P-FLIGHT,XP(E)::R(G)
        • P(c);SBLOCK,XP(E)::QAB(B)+K(D)
      • Refutation
        • P(f);XP(F)
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(f);SBLOCK,XP(F)::QAR(B)+P(E),XP(c)
      • Refutation
        • P(f);
  • Actual
    • K(D);P-FLIGHT
    • Threat
      • QAB(B)
    • Vars
      • P(c);CHECK,OGATE,P_SPINP(c),XP(E)::QAR1(B),XP(c)
      • P(f);SBLOCK,XP(F)::QAR(B)+P(E),XP(c)
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