MESON Chess Problem Database

Problem Display
PID: 90294 (8/8/4N3/4P2Q/4pNr1/4k1P1/6P1/4K3 w - - 0 1)

Goldschmidt, Ervin

4th Prize, Die Schwalbe, 1929

8/8/4N3/4P2Q/4pNr1/4k1P1/6P1/4K3

#2

7 + 3

6490 yacpdb 2009
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg3
      • 2.Qe2#
    • 1...Rxf4
      • 2.Qe2#
    • 1...Rh4
      • 2.Qe2#
    • 1...Rg5
      • 2.Qe2#
    • 1...Rg6
      • 2.Qe2#
    • 1...Rg7
      • 2.Qe2#
    • 1...Rg8
      • 2.Qe2#
  • Tries
    • 1.Kd1?
      • 1...Rxg3
        • 2.Qe2#
      • 1...Rxf4
        • 2.Qe2#
      • 1...Rh4
        • 2.Qe2#
      • 1...Rg5
        • 2.Qe2#
      • 1...Rg6
        • 2.Qe2#
      • 1...Rg7
        • 2.Qe2#
      • 1...Rg8
        • 2.Qe2#
      • 1...Kf2!
    • 1.Sh3?
      • 1...Rxg3
        • 2.Qe2#
      • 1...Rf4
        • 2.Qe2#
      • 1...Rh4
        • 2.Qe2#
      • 1...Rg5
        • 2.Qe2#
      • 1...Rg6
        • 2.Qe2#
      • 1...Rg7
        • 2.Qe2#
      • 1...Rg8
        • 2.Qe2#
      • 1...Kd3!
    • 1.Sg6?
      • 1...Rxg3
        • 2.Qe2#
      • 1...Rxg6
        • 2.Qe2#
      • 1...Rf4
        • 2.Qe2#
      • 1...Rh4
        • 2.Qe2#
      • 1...Rg5
        • 2.Qe2#
      • 1...Kd3!
  • Keys
    • 1.Qh3!
      • 1...Rxg3
        • 2.Qxg3#
      • 1...Rxf4
        • 2.gxf4#
      • 1...Rh4
        • 2.gxh4#
      • 1...Rg5
        • 2.g4#
      • 1...Rg6
        • 2.g4#
      • 1...Rg7
        • 2.g4#
      • 1...Rg8
        • 2.g4#

This anticipates 99272(1952)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 7
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(c);OGATE,XP(C)::QAR1(F)
    • R(c);OGATE,XS(D)::QAR1(F)
    • R(c);OGATE::QAR1(F)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • R(c);OGATE,XP(C)::QAR1(F)
        • R(c);OGATE,XS(D)::QAR1(F)
        • R(c);OGATE::QAR1(F)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • R(c);OGATE,XP(C)::QAR1(F)
        • R(c);OGATE::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(D);
      • Vars
        • R(c);OGATE,XP(C)::QAR1(F)
        • R(c);OGATE,XS(D)::QAR1(F)
        • R(c);OGATE::QAR1(F)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • Q(F);
    • Vars
      • R(c);OGATE,P_SPINR(c),XP(C)::QAR2(F),XR(c)
      • R(c);OGATE,XS(D)::QAR(F)+P(C),XR(c)
      • R(c);OGATE::QAR(F)+P(C),XR(c)
      • R(c);OGATE::QAR(F)+P(C)
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