MESON Chess Problem Database

Problem Display
PID: 245446 (b1r5/1QbB2B1/2nN3r/2pkPR2/p5p1/K2PP1N1/3P3q/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Pat a Mat, 2010

b1r5/1QbB2B1/2nN3r/2pkPR2/p5p1/K2PP1N1/3P3q/8

#2

11 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd6
      • 2.e6#
    • 1...Re6
      • 2.Bxc6#
    • 1...c4
      • 2.Qb5#
  • Tries
    • 1.Sge4?
      • threat
        • 2.Sc3#
      • 1...Qxe5
        • 2.Rxe5#
      • 1...Qxd2
        • 2.e6#
      • 1...c4
        • 2.Qb5#
        • 2.dxc4#
      • 1...Ba5!
    • 1.Sde4?
      • threat
        • 2.Sc3#
      • 1...Bxe5
        • 2.Rxe5#
      • 1...Ba5
        • 2.e6#
      • 1...c4
        • 2.Qb5#
      • 1...Qxd2!
    • 1.Sb5?
      • threat
        • 2.Sc3#
        • 2.e4#
      • 1...Qxd2
        • 2.e4#
      • 1...Bxe5
        • 2.Rxe5#
        • 2.e4#
      • 1...Qh1
        • 2.Sc3#
      • 1...Qe2
        • 2.Sc3#
      • 1...Qg2
        • 2.Sc3#
      • 1...Ba5
        • 2.e4#
        • 2.e6#
      • 1...c4!
    • 1.Qb3+?
      • 1...c4
        • 2.Qxc4#
        • 2.Qb5#
      • 1...axb3!
  • Keys
    • 1.Qa6!
      • threat
        • 2.Qc4#
      • 1...Sxe5
        • 2.Rxe5#
      • 1...c4
        • 2.Qxc4#
        • 2.Qb5#
      • 1...Sa5
        • 2.e6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(g);SBLOCK,XS(H)::R(G)+P(F)
    • R(g);SBLOCK::B(J),XS(f)
    • P(d);OGATEB::QAR2(I)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(E)
      • Vars
        • Q(a);OGATE,P_SPINQ(a),XP(F)::R1(G),XQ(a)
        • Q(a);N_GUARD,XP(A)::R(G)+P(F)
      • Refutation
        • B(h);
    • Try
      • S(H);
      • Threat
        • S(H)
      • Vars
        • B(h);OGATE,P_SPINB(h),XP(F)::R1(G),XB(h)
        • B(h);N_GUARD::R(G)+P(F)
        • P(d);OGATEB::QAR2(I)
      • Refutation
        • Q(a);XP(A)
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);XP(A)::P(D)
        • Q(a);::S(H)
      • Refutation
        • P(d);
    • Try
      • Q(I);CHECK,N_PINS(f)
      • Refutation
        • P(b);XQ(I)
  • Actual
    • Q(I);N_PINS(f)
    • Threat
      • QAB1(I)
    • Vars
      • S(f);OGATE,P_SPINS(f),XP(F)::R1(G),XS(f)
      • S(f);N_GUARD::R(G)+P(F)
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