MESON Chess Problem Database

Problem Display
PID: 175234 (nR4NK/1Qb1rk2/1pN5/5B1P/3R2P1/2B5/8/8 w - - 0 1)

Stubbs, Arthur Goodwin

San Francisco Chronicle, 1902

nR4NK/1Qb1rk2/1pN5/5B1P/3R2P1/2B5/8/8

#2

10 + 5

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Sxe5#
    • 1...Rd7
      • 2.Rxd7#
    • 1...Bh2
      • 2.Qxe7#
    • 1...Bg3
      • 2.Qxe7#
    • 1...Bf4
      • 2.Qxe7#
    • 1...Be5+
      • 2.Sxe5#
    • 1...Bxb8
      • 2.Qxe7#
  • Tries
    • 1.Rd6?
      • threat
        • 2.Sh6#
        • 2.Bg6#
        • 2.Rf6#
      • 1...Bxd6
        • 2.Sh6#
      • 1...Bxb8
        • 2.Qxe7#
      • 1...Re8
        • 2.Rf6#
      • 1...Re6
        • 2.Bxe6#
      • 1...Bd8!
    • 1.Qxc7?
      • threat
        • 2.Se5#
        • 2.Qxe7#
      • 1...Rxc7
        • 2.Se5#
      • 1...Rd7
        • 2.Se5#
        • 2.Rxd7#
        • 2.Qxd7#
      • 1...Sxc7!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Sh6#
      • 1...Be5+
        • 2.Sxe5#
      • 1...Bxf4
        • 2.Qxe7#
      • 1...Bxb8
        • 2.Qxe7#
      • 1...Re8
        • 2.Bc8#
      • 1...Bd8
        • 2.Bd7#
      • 1...Re5
        • 2.Sxe5#
      • 1...Re6
        • 2.Bg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD,P_SPINB(b)::S(F),XR(c)
    • R(c);OGATEB::R(B),XR(c)
    • B(b);OGATE,P_SPINR(c)::QAR1(G),XR(c)
    • B(b);CHECK,N_GUARD,P_SPINR(c)::S(F),XB(b)
    • B(b);OGATE,P_SPINR(c),XR(H)::QAR1(G),XR(c)
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(3)
      • Vars
        • B(b);P_SPINR(c),XR(B)::S(I)
        • B(b);OGATE,P_SPINR(c),XR(H)::QAR1(G),XR(c)
        • R(c);P_PINS(I),P_SPINB(b)::R1(B)
        • R(c);N_GUARD,P_SPINB(b)::B(D),XR(c)
      • Refutation
        • B(b);P_SPINR(c)
    • Try
      • Q(G);P_PINR(c),XB(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(c);N_SPINR(c),XQ(G)::S(F)
      • Refutation
        • S(e);N_SPINR(c),XQ(G)
  • Actual
    • R(B);
    • Threat
      • S(I)
    • Vars
      • B(b);CHECK,N_GUARD,P_SPINR(c)::S(F),XB(b)
      • B(b);OGATE,P_SPINR(c),XR(B)::QAR1(G),XR(c)
      • B(b);OGATE,P_SPINR(c),XR(H)::QAR1(G),XR(c)
      • R(c);P_PINS(I),P_SPINB(b),SBLOCK::R(B)+B(D)
      • B(b);N_GUARD,P_SPINR(c)::R(B)+B(D)
      • R(c);N_GUARD,P_SPINB(b)::S(F),XR(c)
      • R(c);P_SPINB(b),SBLOCK::R(B)+B(D),DCHECK
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