MESON Chess Problem Database

Problem Display
PID: 48883 (2Q4B/4p3/4R1n1/bp1K2N1/5p2/1r1krRp1/3p2N1/1b1B1n2 w - - 0 1)

Gamage, Frederick

Mitteldeutsche Zeitung, 1939

2Q4B/4p3/4R1n1/bp1K2N1/5p2/1r1krRp1/3p2N1/1b1B1n2

#2

8 + 12

459 Nebraska Chess Bulletin 1950
5064 100 Years of the American Two-move Chess Problem 1962
5397 Frederick Gamage (Prcic) 2004

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Qc3#
    • 1...Rxf3
      • 2.Be2#
    • 1...Ba2
      • 2.Qc2#
    • 1...Bc2
      • 2.Qxc2#
    • 1...Sh4
      • 2.Sxf4#
    • 1...Se5
      • 2.Sxf4#
    • 1...Sf8
      • 2.Sxf4#
    • 1...Sxh8
      • 2.Sxf4#
    • 1...b4
      • 2.Qa6#
      • 2.Qc4#
  • Tries
    • 1.Rexe3+?
      • 1...fxe3
        • 2.Qf5#
      • 1...Sxe3+!
    • 1.Rxe7?
      • threat
        • 2.Qf5#
      • 1...Sxh8
        • 2.Sxf4#
      • 1...Rb4
        • 2.Qc3#
      • 1...Sh4
        • 2.Sxf4#
      • 1...Se5
        • 2.Sxf4#
      • 1...Sxe7+!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Qf5#
      • 1...e6+
        • 2.Kc5#
      • 1...Sxh8
        • 2.Sxf4#
      • 1...Rb4
        • 2.Qc3#
      • 1...Sh4
        • 2.Sxf4#
      • 1...Se5
        • 2.Sxf4#
      • 1...e5
        • 2.Ke6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(d);N_GUARD,S_CUTB(i)::QAR1(G)
    • R(f);N_SPINR(f),XR(C)::B(A)
    • B(a);N_GUARD::QAB1(G)
    • B(a);N_GUARD::QAB1(G),XB(a)
    • S(k);N_GUARD::S(B),XP(h)
    • S(k);N_GUARD,XB(H)::S(B),XP(h)
  • Tries
    • Try
      • R(F);CHECK,XR(f)
      • Vars
        • P(h);P_SPINP(h),XR(F)::QAB(G)
      • Refutation
        • S(b);CHECK,P_SPINS(b),XR(F)
    • Try
      • R(F);XP(l)
      • Threat
        • QAB(G)
      • Vars
        • S(k);N_GUARD,XB(H)::S(B),XP(h)
        • R(d);N_GUARD,S_CUTB(i)::QAR1(G)
        • S(k);N_GUARD::S(B),XP(h)
      • Refutation
        • S(k);CHECK,XR(F)
  • Actual
    • R(F);
    • Threat
      • QAB(G)
    • Vars
      • P(l);CHECK,N_GUARD::R(F)+K(D)
      • S(k);N_GUARD,XB(H)::S(B),XP(h)
      • R(d);N_GUARD,S_CUTB(i)::QAR1(G)
      • S(k);N_GUARD::S(B),XP(h)
      • P(l);::R(F)+K(D)
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