MESON Chess Problem Database

Problem Display
PID: 227947 (Q7/4p2r/5b1q/1K1R2rp/2P1k3/pB1p4/5Rn1/2B2N1b w - - 0 1)

Shire, David J

US Problem Bulletin, 1986

Q7/4p2r/5b1q/1K1R2rp/2P1k3/pB1p4/5Rn1/2B2N1b

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rg3
      • 2.Sxg3#
    • 1...Rxd5+
      • 2.Qxd5#
    • 1...Re5
      • 2.Sg3#
    • 1...Rf5
      • 2.Sg3#
    • 1...Be5
      • 2.Rd6#
    • 1...Se1
      • 2.Rf4#
    • 1...Se3
      • 2.Sd2#
    • 1...Sf4
      • 2.Rxf4#
    • 1...Sh4
      • 2.Rf4#
    • 1...d2
      • 2.Bc2#
    • 1...e5
      • 2.Rd7#
  • Tries
    • 1.Rc5+?
      • 1...Rd5
        • 2.Qxd5#
      • 1...Kd4!
    • 1.Re5+?
      • 1...Kxe5
        • 2.Qd5#
      • 1...Kd4!
  • Keys
    • 1.Bd1!
      • threat
        • 2.Bf3#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Rg3
        • 2.Sxg3#
      • 1...Re5
        • 2.Sg3#
      • 1...Rf5
        • 2.Sg3#
      • 1...Be5
        • 2.Rd6#
      • 1...Se1
        • 2.Rf4#
      • 1...Se3
        • 2.Sd2#
      • 1...Sf4
        • 2.Rxf4#
      • 1...Sh4
        • 2.Rf4#
      • 1...d2
        • 2.Bc2#
      • 1...e5
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(f);N_GUARD,N_PINR(G)::S(B),XR(f)
    • R(f);CHECK,OGATE,P_SPINR(f),XR(G)::QAB1(H),XR(f)
    • R(f);N_GUARD::S(B)
    • B(h);N_PINR(G),SBLOCK::QAB(H)+R(G)
    • S(b);N_GUARD::R1(C)
    • S(b);SBLOCK::S(B)
    • S(b);N_GUARD::R1(C),XS(b)
    • P(d);OGATEB::B(D)
    • P(j);N_PINR(G),SBLOCK::QAB(H)+R(G)
  • Tries
    • Try
      • R(G);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAB1(H),XR(f)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(G);CHECK
      • Vars
        • K(e);P-FLIGHT,XR(G)::QAR1(H)
      • Refutation
        • K(e);P-FLIGHT
  • Actual
    • B(D);
    • Threat
      • B(D)
    • Vars
      • R(f);CHECK,OGATE,P_SPINR(f),XR(G)::QAB1(H),XR(f)
      • R(f);N_GUARD,N_PINR(G)::S(B),XR(f)
      • R(f);N_GUARD::S(B)
      • B(h);N_PINR(G),SBLOCK::QAB(H)+R(G)
      • S(b);N_GUARD::R1(C)
      • S(b);SBLOCK::S(B)
      • S(b);N_GUARD::R1(C),XS(b)
      • P(d);OGATEB::B(D)
      • P(j);N_PINR(G),SBLOCK::QAB(H)+R(G)
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