MESON Chess Problem Database

Problem Display
PID: 232704 (3NR3/3K1p1b/1B3p2/RP1k4/qP3P1b/3P3Q/7n/8 w - - 0 1)

Frohlich, Georg

Freie Presse, 1974

3NR3/3K1p1b/1B3p2/RP1k4/qP3P1b/3P3Q/7n/8

#2

10 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5+
      • 2.Rxb5#
    • 1...Bxd3
      • 2.Qxd3#
    • 1...Bf5+
      • 2.Qxf5#
    • 1...Bg8
      • 2.Qf5#
    • 1...f5
      • 2.Re5#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sc7#
      • 1...Qxb5+
        • 2.Rxb5#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...fxe6
        • 2.Qxe6#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Qc2!
    • 1.Sxf7?
      • threat
        • 2.Qe6#
      • 1...Qxb5+
        • 2.Rxb5#
      • 1...Bf5+
        • 2.Qxf5#
      • 1...f5
        • 2.Re5#
      • 1...Sg4!
    • 1.Re6?
      • threat
        • 2.Rd6#
      • 1...Qxb5+
        • 2.Rxb5#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...fxe6
        • 2.Qxe6#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Qxb4!
    • 1.Qg2+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Sf3!
    • 1.Qf3+?
      • 1...Be4
        • 2.Qxe4#
      • 1...Sxf3!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Se7#
      • 1...Bf5+
        • 2.Qxf5#
      • 1...Qxb5
        • 2.Rxb5#
      • 1...Qxb4
        • 2.Sxb4#
      • 1...Bxd3
        • 2.Qxd3#
      • 1...f5
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • Q(b);CHECK,OGATE,P_SPINQ(b),XP(F)::R(E),XQ(b)
    • B(g);OGATE,XP(A)::QAR2(B),XB(g)
    • B(g);CHECK,N_GUARD::QAR2(B),XB(g)
    • B(g);N_GUARD::QAR2(B)
    • P(e);N_GUARD::R1(J)
  • Tries
    • Try
      • S(I);
      • Threat
        • S(I)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XP(F)::R(E),XQ(b)
        • B(g);OGATE,XP(A)::QAR2(B),XB(g)
        • P(f);OGATE,XS(I)::QAB1(B),XP(f)
        • B(g);N_GUARD,P_PINS(I)::QAR2(B),XB(g)
      • Refutation
        • Q(b);N_PINP(F)
    • Try
      • S(I);XP(f)
      • Threat
        • QAB1(B)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XP(F)::R(E),XQ(b)
        • B(g);CHECK,N_GUARD::QAR2(B),XB(g)
        • P(e);N_GUARD::R1(J)
      • Refutation
        • S(a);
    • Try
      • R(J);
      • Threat
        • R1(J)
      • Vars
        • Q(b);CHECK,OGATE,P_SPINQ(b),XP(F)::R(E),XQ(b)
        • B(g);OGATE,XP(A)::QAR2(B),XB(g)
        • P(f);OGATE,XR(J)::QAB1(B),XP(f)
        • B(g);N_GUARD,P_PINR(J)::QAR2(B),XB(g)
      • Refutation
        • Q(b);N_PINP(F),XP(C)
    • Try
      • Q(B);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAB1(B),XB(g)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(B);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::QAB1(B),XB(g)
      • Refutation
        • S(a);XQ(B)
  • Actual
    • S(I);N_SPINP(F)
    • Threat
      • S(I)
    • Vars
      • B(g);CHECK,N_GUARD::QAR2(B),XB(g)
      • Q(b);OGATE,P_PINS(I),P_SPINQ(b),XP(F)::R(E),XQ(b)
      • Q(b);XP(C)::S(I),XQ(b)
      • B(g);OGATE,XP(A)::QAR2(B),XB(g)
      • P(e);N_GUARD::R1(J)
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