MESON Chess Problem Database

Problem Display
PID: 272988 (2n1N1b1/1r1pn1p1/pp1Bk2p/2p2R2/3p4/2NBb2P/4Q3/4K3 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Pat a Mat, 2023

2n1N1b1/1r1pn1p1/pp1Bk2p/2p2R2/3p4/2NBb2P/4Q3/4K3

#2

8 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Bf7
      • 2.Re5#
    • 1...Sxf5
      • 2.Bc4#
    • 1...Sxd6
      • 2.Sxg7#
    • 1...dxc3
      • 2.Qxe3#
    • 1...g5
      • 2.Rf6#
    • 1...g6
      • 2.Rf6#
  • Tries
    • 1.Sb5?
      • threat
        • 2.Sxg7#
      • 1...Sxf5
        • 2.Bc4#
      • 1...g5
        • 2.Sg7#
      • 1...g6
        • 2.Sg7#
      • 1...axb5!
    • 1.Bc4+?
      • 1...Kxf5
        • 2.Qg4#
      • 1...Sd5!
    • 1.Qa2+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...c4!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sxg7#
      • 1...Bd2+
        • 2.Sxd2#
      • 1...Bf2+
        • 2.Sxf2#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Sxf5
        • 2.Bc4#
      • 1...g5
        • 2.Sg7#
      • 1...g6
        • 2.Sg7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • B(m);SBLOCK::R1(F)
    • S(j);N_GUARD,SBLOCK,XR(F)::B(D)
    • S(l);SBLOCK,XB(G)::S(H),XP(k)
    • P(b);N_GUARD,XS(C)::QAR(B),XB(a)
    • P(k);N_GUARD::R1(F)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(H),XP(k)
      • Vars
        • S(j);N_GUARD,SBLOCK,XR(F)::B(D)
        • P(k);::S(H)
      • Refutation
        • P(d);XS(C)
    • Try
      • B(D);CHECK
      • Vars
        • K(f);N_SPINB(a),S_CUTS(j),S_FLIGHT,XR(F)::QAB1(B)
      • Refutation
        • S(j);P_SPINS(j)
    • Try
      • Q(B);CHECK,N_PINB(a)
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::QAB1(B),XS(j)
      • Refutation
        • P(c);P_SPINP(c)
  • Actual
    • S(C);N_PINB(a)
    • Threat
      • S(H),XP(k)
    • Vars
      • B(a);CHECK::QAR(B)+S(C),XB(a)
      • K(f);OGATEB,S_FLIGHT,XR(F)::QAB1(B)
      • S(j);N_GUARD,SBLOCK,XR(F)::B(D)
      • P(k);::S(H)
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