MESON Chess Problem Database

Problem Display
PID: 146711 (bn3r1n/3P1p2/1P1kNP2/R2PN1RK/2p1P1B1/bp6/pr3p2/Q5B1 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Australian Chess Problem Magazine, 1994

bn3r1n/3P1p2/1P1kNP2/R2PN1RK/2p1P1B1/bp6/pr3p2/Q5B1

#2

13 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Rc8
      • 2.dxc8S#
    • 1...Re8
      • 2.dxe8S#
    • 1...Bxd5
      • 2.Rxd5#
    • 1...Sxd7
      • 2.Sxc4#
  • Tries
    • 1.Sc7?
      • threat
        • 2.Sxc4#
      • 1...Bxd5
        • 2.Rxd5#
      • 1...f1Q
        • 2.Sb5#
      • 1...f1B
        • 2.Sb5#
      • 1...c3
        • 2.Sc4#
      • 1...Rc2!
    • 1.d8Q+?
      • 1...Sd7
        • 2.Sxc4#
        • 2.Qc7#
        • 2.Qe7#
        • 2.Qxd7#
      • 1...Rxd8!
    • 1.d8B?
      • threat
        • 2.Bc7#
        • 2.Be7#
      • 1...Re8
        • 2.Bc7#
      • 1...Sa6
        • 2.Be7#
      • 1...Sc6
        • 2.Bc7#
      • 1...Sg6
        • 2.Bc7#
      • 1...Rxd8!
    • 1.d8R+?
      • 1...Sd7
        • 2.Sxc4#
        • 2.Rxd7#
      • 1...Rxd8!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Sxc4#
      • 1...Bxd5
        • 2.Rxd5#
      • 1...f1Q
        • 2.Sb5#
      • 1...f1B
        • 2.Sb5#
      • 1...Rc2
        • 2.Sf5#
      • 1...Rc8
        • 2.dxc8S#
      • 1...c3
        • 2.Sc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(k);OGATE::PXR(k)=S
    • B(i);OGATE,XP(F)::R1(E),XB(i)
    • S(j);SBLOCK,XP(M)::S(G),XP(f)
  • Tries
    • Try
      • S(K);
      • Threat
        • S(G),XP(f)
      • Vars
        • B(i);OGATE,XP(F)::R1(E),XB(i)
        • P(c);::S(K)
        • P(f);::S(G)
      • Refutation
        • R(b);
    • Try
      • P(M);CHECK
      • Refutation
        • R(k);XQ(M)
    • Try
      • P(M);
      • Threat
        • DUALS(2)
      • Vars
        • R(k);::B(M)
        • S(j);::B(M)
        • S(l);::B(M)
      • Refutation
        • R(k);XB(M)
    • Try
      • P(M);CHECK
      • Refutation
        • R(k);XR(M)
  • Actual
    • S(K);
    • Threat
      • S(G),XP(f)
    • Vars
      • B(i);OGATE,XP(F)::R1(E),XB(i)
      • P(c);::S(K)
      • R(b);::S(K)
      • R(k);OGATE::PXR(k)=S
      • P(f);::S(G)
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