MESON Chess Problem Database

Problem Display
PID: 245456 (5R2/4nQ2/2p3nb/2PpR3/1KNkP2p/p2pN2p/6B1/2B5 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Coello-75 JT (Problemas), 2017

5R2/4nQ2/2p3nb/2PpR3/1KNkP2p/p2pN2p/6B1/2B5

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bxe3
      • 2.Bxe3#
    • 1...Sf5
      • 2.Sxf5#
    • 1...Sc8
      • 2.Sf5#
    • 1...Sg8
      • 2.Sf5#
    • 1...a2
      • 2.Bb2#
    • 1...dxe4
      • 2.Rxe4#
  • Tries
    • 1.Rxe7?
      • threat
        • 2.Sf5#
      • 1...Bxe3
        • 2.Bxe3#
      • 1...Sxe7
        • 2.Qf6#
      • 1...d2!
    • 1.Qf2?
      • threat
        • 2.Sc2#
        • 2.Sf5#
      • 1...Bxe3
        • 2.Bxe3#
        • 2.Qxe3#
      • 1...d2
        • 2.Qxd2#
      • 1...Sf5
        • 2.Sc2#
        • 2.Sxf5#
      • 1...dxc4!
    • 1.Qf6?
      • threat
        • 2.Rxd5#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...dxc4
        • 2.Rd5#
      • 1...dxe4
        • 2.Rxe4#
        • 2.Rd5#
      • 1...hxg2!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Sf3#
      • 1...Kxe3
        • 2.Qf2#
      • 1...Kxe5
        • 2.Qf6#
      • 1...Sxe5
        • 2.Sb3#
      • 1...dxe4
        • 2.Rxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 5
  • Sets
    • B(i);OGATE,XS(C)::B(A),XB(i)
    • S(j);N_GUARD::S(C),XS(j)
    • S(j);N_GUARD::S(C)
    • P(a);N_GUARD::B(A)
    • P(f);OGATE,XP(F)::R1(H),XP(f)
  • Tries
    • Try
      • R(H);XS(j)
      • Threat
        • S(C)
      • Vars
        • B(i);OGATE,XS(C)::B(A),XB(i)
        • S(h);N_GUARD,XR(H)::QAB(I)
      • Refutation
        • P(b);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);OGATEB::QAR2(I),XP(b)
      • Refutation
        • P(f);XS(E)
    • Try
      • Q(I);
      • Threat
        • QAB(I)+R(H),DCHECK,XP(f)
      • Vars
        • S(h);OGATE,P_SPINS(h),XR(H)::QAB1(I),XS(h)
        • P(f);XS(E)::QAB(I)+R(H),DCHECK
      • Refutation
        • P(c);XB(B)
  • Actual
    • S(E);
    • Threat
      • S(E)
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(C)::QAB1(I)
      • K(d);OGATEB,S_FLIGHT,XR(H)::QAB1(I)
      • S(h);SBLOCK,XR(H)::S(E)
      • P(f);OGATE,XP(F)::R1(H),XP(f)
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