MESON Chess Problem Database

Problem Display
PID: 190080 (8/1b4r1/3R3N/2p1k3/4p1pK/4p3/8/3Q4 w - - 0 1)

Gold, S?

The San Francisco Call, 1913

8/1b4r1/3R3N/2p1k3/4p1pK/4p3/8/3Q4

#2

4 + 7

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Sxg4+?
      • 1...Kf4
        • 2.Rf6#
        • 2.Qf1#
      • 1...Kf5
        • 2.Rf6#
        • 2.Qf1#
      • 1...Rxg4+!
    • 1.Sf7+?
      • 1...Kf4
        • 2.Rf6#
        • 2.Qf1#
      • 1...Kf5
        • 2.Qf1#
      • 1...Rxf7!
    • 1.Re6+?
      • 1...Kf4
        • 2.Qf1#
      • 1...Kxe6!
    • 1.Qa1+?
      • 1...Kf4
        • 2.Rf6#
        • 2.Qf6#
      • 1...Kxd6!
    • 1.Qf1?
      • threat
        • 2.Qf6#
      • 1...Rg6
        • 2.Sf7#
      • 1...Rf7
        • 2.Sxf7#
      • 1...Kxd6!
    • 1.Qd4+?
      • 1...Kf4
        • 2.Rf6#
        • 2.Qf6#
      • 1...cxd4!
    • 1.Qd5+?
      • 1...Kf4
        • 2.Rf6#
        • 2.Qf5#
      • 1...Bxd5!
  • Keys
    • 1.Rf6!
      • threat
        • 2.Qd6#
      • 1...Kxf6
        • 2.Qd6#
      • 1...Rd7
        • 2.Sxg4#
      • 1...Bd5
        • 2.Qa1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK,XP(c)
      • Refutation
        • R(g);CHECK,XS(D)
    • Try
      • S(D);CHECK
      • Vars
        • K(e);P-FLIGHT::QAR(A)
      • Refutation
        • R(g);XS(D)
    • Try
      • R(C);CHECK
      • Vars
        • K(e);S_FLIGHT::QAR(A)
      • Refutation
        • K(e);P-FLIGHT,XR(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • K(e);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • R(g);N_GUARD::S(D)
        • R(g);N_GUARD::S(D),XR(g)
      • Refutation
        • K(e);S_FLIGHT,XR(C)
    • Try
      • Q(A);CHECK
      • Refutation
        • P(d);XQ(A)
    • Try
      • Q(A);CHECK
      • Refutation
        • B(f);XQ(A)
  • Actual
    • R(C);
    • Threat
      • QAB1(A)
    • Vars
      • K(e);S_FLIGHT,XR(C)::QAR2(A)
      • R(g);N_GUARD::S(D),XP(c)
      • B(f);SBLOCK::QAB(A)
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