MESON Chess Problem Database

Problem Display
PID: 268869 (1Q3B2/3p4/4b3/P1PpP2r/2pkN1p1/p1R3Pp/2nNK3/3R4 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Troll, 2022

(First published on Wed Nov 9 2022)

1Q3B2/3p4/4b3/P1PpP2r/2pkN1p1/p1R3Pp/2nNK3/3R4

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...dxe4
      • 2.Sb1#
  • Tries
    • 1.Re3?
      • threat
        • 2.Sb1#
        • 2.Sf1#
        • 2.Sb3#
        • 2.Sf3#
      • 1...d6
        • 2.Sf3#
      • 1...Se1
        • 2.Sb3#
        • 2.Sf3#
      • 1...Sb4
        • 2.Sb3#
        • 2.Sf3#
      • 1...c3
        • 2.Rd3#
      • 1...Sxe3!
    • 1.c6?
      • threat
        • 2.Bc5#
      • 1...dxe4
        • 2.Sb1#
      • 1...d6!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sb5#
      • 1...Rxe5+
        • 2.S2e4#
      • 1...Kxc3
        • 2.Sb1#
      • 1...Kxc5
        • 2.Qb6#
      • 1...Kxe5
        • 2.Bg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(g);SBLOCK,XS(F)::R(A)+S(B)
  • Tries
    • Try
      • R(D);
      • Threat
        • DUALS(4)
      • Vars
        • P(j);::R(A)+S(B),DCHECK
        • P(d);N_GUARD::R1(D)
      • Refutation
        • S(a);XR(D)
    • Try
      • P(H);
      • Threat
        • B(K)
      • Vars
        • P(g);SBLOCK,XS(F)::R(A)+S(B)
      • Refutation
        • P(j);
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • R(h);CHECK,SBLOCK,XP(I)::R(A)+S(B)
      • K(e);N_GUARD,S_FLIGHT,XR(D)::S(B)
      • K(e);OGATEB,P_SPINP(d),S_FLIGHT,XP(H)::QAB1(J)
      • K(e);OGATEB,S_FLIGHT,XP(I)::B(K)
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