MESON Chess Problem Database

Problem Display
PID: 201391 (B1bBn3/7N/pN1R4/r3kP1R/r3Pp1p/p7/1bK2Q2/8 w - - 0 1)

Clark, Robert Winslow

L'Alfiere di Re, 1922

B1bBn3/7N/pN1R4/r3kP1R/r3Pp1p/p7/1bK2Q2/8

#2

10 + 10

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rc4+
      • 2.Sxc4#
    • 1...Rc5+
      • 2.Qxc5#
    • 1...Be6
      • 2.Rxe6#
    • 1...Bb7
      • 2.Re6#
    • 1...Sxd6
      • 2.Bf6#
    • 1...f3
      • 2.Qh2#
  • Tries
    • 1.Sxc8?
      • threat
        • 2.Re6#
        • 2.f6#
      • 1...Rc5+
        • 2.Qxc5#
      • 1...Sxd6
        • 2.Bf6#
      • 1...Rd5
        • 2.Re6#
      • 1...f3
        • 2.Qh2#
      • 1...Sf6
        • 2.Bxf6#
        • 2.Re6#
      • 1...Sc7
        • 2.Bf6#
        • 2.f6#
      • 1...Sg7
        • 2.Bf6#
      • 1...Rc4+!
    • 1.Rd5+?
      • 1...Kxe4
        • 2.Sg5#
        • 2.Qe2#
      • 1...Rxd5!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Sf7#
      • 1...Rc4+
        • 2.Sxc4#
      • 1...Rc5+
        • 2.Qxc5#
      • 1...Kxd6
        • 2.Sf7#
      • 1...Sxd6
        • 2.Sf3#
      • 1...f3
        • 2.Qh2#
      • 1...Rd5
        • 2.Rxd5#
      • 1...Be6
        • 2.Rxe6#
      • 1...Bb7
        • 2.Re6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(c);CHECK,N_GUARD::S(F),XR(c)
    • R(f);CHECK,N_GUARD::QAR2(B),XR(f)
    • B(i);N_GUARD::R1(G),XB(i)
    • B(i);N_GUARD::R1(G)
    • S(j);N_GUARD,SBLOCK,XR(G)::B(J)
    • P(d);OGATEB::QAB(B)
  • Tries
    • Try
      • S(F);XB(i)
      • Threat
        • DUALS(2)
      • Vars
        • R(f);CHECK,N_GUARD::QAR2(B),XR(f)
        • S(j);N_GUARD,XR(G)::B(J)
        • R(f);::R1(G)
        • P(d);OGATEB::QAB(B)
        • S(j);N_GUARD::B(J)
      • Refutation
        • R(c);CHECK
    • Try
      • R(G);CHECK
      • Refutation
        • R(f);XR(G)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • R(c);CHECK,N_GUARD::S(F),XR(c)
      • R(f);CHECK,N_GUARD::QAR2(B),XR(f)
      • K(g);S_FLIGHT,XR(G)::S(H)
      • S(j);SBLOCK,XR(G)::S(H)
      • P(d);OGATEB::QAB(B)
      • R(f);N_GUARD::R1(G),XR(f)
      • B(i);N_GUARD::R1(G),XB(i)
      • B(i);N_GUARD::R1(G)
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