MESON Chess Problem Database

Problem Display
PID: 260969 (3Q4/8/2p1B3/3NP3/K1p1kP2/2p2N1R/n1nP1R1b/8 w - - 0 1)

Kupper, Josef

Neue Zurcher Zeitung, 2008

3Q4/8/2p1B3/3NP3/K1p1kP2/2p2N1R/n1nP1R1b/8

#2

10 + 7

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Bf5#
    • 1...Bxf4
      • 2.Sf6#
    • 1...Sd4
      • 2.Sg5#
  • Tries
    • 1.Sxh2?
      • threat
        • 2.Sf6#
      • 1...cxd5
        • 2.Qxd5#
      • 1...Kd4!
    • 1.Sxc3+?
      • 1...Kxf4
        • 2.Qh4#
        • 2.Qg5#
        • 2.Qf6#
        • 2.Qf8#
      • 1...Sxc3+!
    • 1.Sb4?
      • threat
        • 2.Sg5#
      • 1...Kxf4
        • 2.Qh4#
      • 1...Bxf4!
    • 1.Sb6?
      • threat
        • 2.Sg5#
      • 1...Kxf4
        • 2.Qh4#
      • 1...Bxf4!
    • 1.Sc7?
      • threat
        • 2.Sg5#
      • 1...Kxf4
        • 2.Qh4#
      • 1...Bxf4!
    • 1.Se7?
      • threat
        • 2.Sg5#
      • 1...Bxf4
        • 2.Bf5#
      • 1...Kxf4!
    • 1.Re2+?
      • 1...Se3
        • 2.Rxe3#
      • 1...Kd3!
    • 1.Qf6?
      • threat
        • 2.Qf5#
        • 2.Qg6#
      • 1...Kd3
        • 2.Bf5#
        • 2.Qf5#
        • 2.Qg6#
      • 1...cxd5
        • 2.Qf5#
      • 1...Sd4
        • 2.Sg5#
      • 1...Se3!
    • 1.Qf8?
      • threat
        • 2.Qf5#
      • 1...Kd3
        • 2.Bf5#
        • 2.Qf5#
      • 1...Sd4
        • 2.Sg5#
      • 1...Se3!
    • 1.d3+?
      • 1...Kxd3
        • 2.Bf5#
      • 1...cxd3!
  • Keys
    • 1.Se3!
      • threat
        • 2.Sg5#
      • 1...Kxf4
        • 2.Qh4#
      • 1...Bxf4
        • 2.Bf5#
      • 1...Sd4
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(f);N_GUARD,S_FLIGHT::B(I)
    • B(c);SBLOCK,XP(F)::S(G)
    • S(b);SBLOCK::S(C)
  • Tries
    • Try
      • S(C);XB(c)
      • Threat
        • S(G)
      • Vars
        • P(g);OGATE,XS(G)::QAB1(J),XP(g)
      • Refutation
        • K(f);P-FLIGHT
    • Try
      • S(G);CHECK,XP(d)
      • Refutation
        • S(a);CHECK,XS(G)
    • Try
      • S(G);
      • Threat
        • S(C)
      • Vars
        • K(f);OGATEB,P-FLIGHT,XP(F)::QAR2(J)
      • Refutation
        • B(c);XP(F)
    • Try
      • S(G);
      • Threat
        • S(C)
      • Vars
        • K(f);OGATEB,P-FLIGHT,XP(F)::QAR2(J)
      • Refutation
        • B(c);XP(F)
    • Try
      • S(G);
      • Threat
        • S(C)
      • Vars
        • K(f);OGATEB,P-FLIGHT,XP(F)::QAR2(J)
      • Refutation
        • B(c);XP(F)
    • Try
      • S(G);
      • Threat
        • S(C)
      • Vars
        • B(c);SBLOCK,XP(F)::B(I)
      • Refutation
        • K(f);P-FLIGHT,XP(F)
    • Try
      • R(B);CHECK
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::R1(B),XS(b)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • P(g);XS(G)::QAB1(J)
        • S(b);SBLOCK::S(C)
      • Refutation
        • S(b);
    • Try
      • Q(J);
      • Threat
        • QAB1(J)
      • Vars
        • S(b);SBLOCK::S(C)
      • Refutation
        • S(b);
    • Try
      • P(A);CHECK
      • Vars
        • K(f);N_GUARD,S_FLIGHT,XP(A)::B(I)
      • Refutation
        • P(e);XP(A)
  • Actual
    • S(G);
    • Threat
      • S(C)
    • Vars
      • K(f);OGATEB,P-FLIGHT,XP(F)::QAR2(J)
      • B(c);SBLOCK,XP(F)::B(I)
      • S(b);N_GUARD::QAR1(J),XS(b)
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