MESON Chess Problem Database

Problem Display
PID: 253128 (b7/6BB/nK1p4/3k4/3PR3/8/8/2Q5 w - - 0 1)

Jaeger, Peter R

Deutsche Schachzeitung, 1988

b7/6BB/nK1p4/3k4/3PR3/8/8/2Q5

#2

6 + 4

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc6
      • 2.Qxc6#
  • Tries
    • 1.Kb5?
      • threat
        • 2.Qg5#
        • 2.Qc4#
      • 1...Bc6+
        • 2.Qxc6#
      • 1...Sc7+!
    • 1.Re5+?
      • 1...Kxd4
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rc5#
        • 2.Rg5#
        • 2.Rh5#
      • 1...dxe5!
    • 1.Re7?
      • threat
        • 2.Be4#
        • 2.Bg8#
      • 1...Sc7
        • 2.Be4#
      • 1...Sc5!
    • 1.Re8?
      • threat
        • 2.Be4#
        • 2.Bg8#
      • 1...Sc7
        • 2.Be4#
      • 1...Sc5!
    • 1.Qc2?
      • threat
        • 2.Bg8#
        • 2.Qb3#
        • 2.Qa2#
      • 1...Sb4
        • 2.Bg8#
        • 2.Qb3#
      • 1...Sc7
        • 2.Qb3#
        • 2.Qa2#
      • 1...Sc5!
  • Keys
    • 1.Qd1!
      • threat
        • 2.Qb3#
      • 1...Kc4
        • 2.d5#
      • 1...Sc5
        • 2.dxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(d);N_GUARD::QAB1(A),XB(d)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • B(d);CHECK,N_GUARD::QAB1(A),XB(d)
      • Refutation
        • S(b);CHECK
    • Try
      • R(C);CHECK
      • Refutation
        • P(c);XR(C)
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::B(F)
      • Refutation
        • S(b);
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);::B(F)
      • Refutation
        • S(b);
    • Try
      • Q(A);
      • Threat
        • DUALS(3)
      • Refutation
        • S(b);
  • Actual
    • Q(A);
    • Threat
      • QAB(A)
    • Vars
      • K(a);OGATE,S_FLIGHT::R(C)+P(B)
      • S(b);OGATE::QAR(A)+P(B),XS(b)
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