MESON Chess Problem Database

Problem Display
PID: 52421 (3q4/n1B4b/2P4b/p6R/rk1p4/p3n3/P3B1p1/Q1R3K1 w - - 0 1)

Gamage, Frederick

3rd Prize, Feigl MT, 1948-1950

3q4/n1B4b/2P4b/p6R/rk1p4/p3n3/P3B1p1/Q1R3K1

#2

8 + 11

70 American Chess Problemist 1950
5064 100 Years of the American Two-move Chess Problem 1962
5397 Frederick Gamage (Prcic) 2004
133 The Problemist Supplement 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Qh4
      • 2.Bd6#
    • 1...Qd6
      • 2.Bxd6#
    • 1...Qa8
      • 2.Bd6#
    • 1...Qc8
      • 2.Bd6#
    • 1...Qe8
      • 2.Bd6#
    • 1...Qg8
      • 2.Bd6#
    • 1...Qh8
      • 2.Bd6#
    • 1...Bb1
      • 2.Rxb1#
      • 2.Qxb1#
    • 1...Sd1
      • 2.Rc4#
    • 1...Sf1
      • 2.Rc4#
    • 1...Sc2
      • 2.Rb1#
    • 1...Sc4
      • 2.Rxc4#
    • 1...Sg4
      • 2.Rc4#
    • 1...Sd5
      • 2.Qxd4#
    • 1...Sf5
      • 2.Qb1#
    • 1...Sb5
      • 2.Rxb5#
    • 1...Sxc6
      • 2.Rb5#
    • 1...Sc8
      • 2.Rb5#
    • 1...d3
      • 2.Qc3#
      • 2.Qb1#
  • Tries
    • 1.Rc2?
      • threat
        • 2.Qb1#
        • 2.Qe1#
      • 1...Bxc2
        • 2.Qe1#
      • 1...Qh4
        • 2.Bd6#
        • 2.Qb1#
      • 1...Qd5
        • 2.Qe1#
      • 1...Qg8
        • 2.Bd6#
        • 2.Qe1#
      • 1...Bg8
        • 2.Qe1#
      • 1...Sd1
        • 2.Rc4#
      • 1...Sf1
        • 2.Rc4#
        • 2.Qb1#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Sg4
        • 2.Rc4#
        • 2.Qb1#
      • 1...Sd5
        • 2.Qxd4#
        • 2.Qb1#
      • 1...Sf5
        • 2.Qb1#
      • 1...Sb5
        • 2.Rxb5#
        • 2.Qb1#
      • 1...d3
        • 2.Qc3#
        • 2.Qb1#
      • 1...Sxc2!
    • 1.Qxd4+?
      • 1...Sc4
        • 2.Rxc4#
        • 2.Qc3#
        • 2.Qc5#
        • 2.Qxc4#
      • 1...Qxd4!
  • Keys
    • 1.Bg3!
      • threat
        • 2.Be1#
      • 1...Qh4
        • 2.Bd6#
      • 1...Sd1
        • 2.Rc4#
      • 1...Sf1
        • 2.Rc4#
      • 1...Sc2
        • 2.Rb1#
      • 1...Sc4
        • 2.Rxc4#
      • 1...Sg4
        • 2.Rc4#
      • 1...Sd5
        • 2.Qxd4#
      • 1...Sf5
        • 2.Qb1#
      • 1...Sb5
        • 2.Rxb5#
      • 1...d3
        • 2.Qc3#
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 8
  • Sets
    • Q(k);N_GUARD::B(H)
    • Q(k);N_GUARD::B(H),XQ(k)
    • S(c);N_GUARD::R1(B)
    • S(c);S_CUTB(j)::R(B)
    • S(c);N_GUARD::R1(B),XS(c)
    • S(c);N_GUARD,S_CUTQ(k)::QAR2(A),XP(f)
    • S(c);S_CUTB(j)::QAR(A)
    • S(i);N_GUARD::R1(F),XS(i)
    • S(i);N_GUARD,XP(G)::R1(F)
    • S(i);N_GUARD::R1(F)
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(j);XR(B)::QAB(A)
        • Q(k);::QAB(A)
        • B(j);::QAB(A)
        • S(c);N_GUARD::R1(B)
        • S(c);N_GUARD::R1(B),XS(c)
        • S(c);::QAR(A)
      • Refutation
        • S(c);XR(B)
    • Try
      • Q(A);CHECK,XP(f)
      • Refutation
        • Q(k);XQ(A)
  • Actual
    • B(H);
    • Threat
      • B(H)
    • Vars
      • Q(k);N_GUARD::B(H)
      • S(c);N_GUARD::R1(B)
      • S(c);S_CUTB(j)::R(B)
      • S(c);N_GUARD::R1(B),XS(c)
      • S(c);N_GUARD,S_CUTQ(k)::QAR2(A),XP(f)
      • S(c);S_CUTB(j)::QAR(A)
      • S(i);N_GUARD::R1(F),XS(i)
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