MESON Chess Problem Database

Problem Display
PID: 249567 (3N4/B3p2n/1N1P3n/1p2k3/1P3R2/8/2B2P2/6QK w - - 0 1)

Haefele, Hans Frieder

2nd Comm., Deutsche Schachzeitung, 1978

3N4/B3p2n/1N1P3n/1p2k3/1P3R2/8/2B2P2/6QK

#2

10 + 5

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxf4
      • 2.Qg3#
    • 1...Kxd6
      • 2.Bb8#
  • Tries
    • 1.Sc4+?
      • 1...Kxf4
        • 2.Qg3#
      • 1...Kd5
        • 2.Rd4#
        • 2.Qd1#
        • 2.Qg2#
      • 1...bxc4!
    • 1.Sd7+?
      • 1...Kxf4
        • 2.Qg3#
      • 1...Kd5
        • 2.Rd4#
        • 2.Qd1#
      • 1...Kxd6!
    • 1.Sf7+?
      • 1...Kxf4
        • 2.Qg3#
      • 1...Ke6
        • 2.Bb3#
        • 2.Qe1#
      • 1...Sxf7!
    • 1.Re4+?
      • 1...Kxd6
        • 2.Bb8#
      • 1...Kf6
        • 2.Re6#
      • 1...Kf5!
    • 1.Rf5+?
      • 1...Kd4
        • 2.Qa1#
      • 1...Kxd6
        • 2.Bb8#
      • 1...Sxf5!
    • 1.Qa1+?
      • 1...Kxd6
        • 2.Bb8#
      • 1...Kxf4!
    • 1.Qd1?
      • threat
        • 2.Qd4#
      • 1...Sf5
        • 2.Rxf5#
      • 1...Kxf4!
    • 1.Qe1+?
      • 1...Kxd6
        • 2.Bb8#
      • 1...Kxf4!
    • 1.Qg7+?
      • 1...Kxf4
        • 2.Qg3#
      • 1...Kxd6
        • 2.Bb8#
      • 1...Sf6!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Sd7#
      • 1...Kxd4
        • 2.Qa1#
      • 1...Kf6
        • 2.Sd7#
      • 1...Sf6
        • 2.f4#
      • 1...Sf8
        • 2.Qg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(b);OGATEB,S_FLIGHT,XR(F)::QAB1(A)
    • K(b);OGATEB,S_FLIGHT,XP(H)::B(I)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(F)::QAB1(A)
      • Refutation
        • P(a);XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(F)::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT,XP(H)
    • Try
      • S(J);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(F)::QAB1(A)
      • Refutation
        • S(c);XS(J)
    • Try
      • R(F);CHECK
      • Vars
        • K(b);S_FLIGHT,XP(H)::B(I)
        • K(b);OGATE,S_FLIGHT::R1(F)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • K(b);S_FLIGHT::QAB(A)
        • K(b);S_FLIGHT,XP(H)::B(I)
      • Refutation
        • S(c);XR(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XP(H)::B(I)
      • Refutation
        • K(b);S_FLIGHT,XR(F)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • S(c);N_GUARD::R1(F),XS(c)
      • Refutation
        • K(b);S_FLIGHT,XR(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XP(H)::B(I)
      • Refutation
        • K(b);S_FLIGHT,XR(F)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATEB,S_FLIGHT,XR(F)::QAB1(A)
        • K(b);S_FLIGHT,XP(H)::B(I)
      • Refutation
        • S(e);P_SPINS(e)
  • Actual
    • R(F);
    • Threat
      • S(G)
    • Vars
      • K(b);OGATEB,S_FLIGHT,XR(F)::QAB(A)
      • K(b);S_FLIGHT::S(G)
      • S(e);SBLOCK::P(D)
      • S(e);N_GUARD::QAB(A)
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