MESON Chess Problem Database

Problem Display
PID: 245438 (3N3N/b1p2RK1/4r1pp/2QPk3/1B2P3/P1P3P1/2P1q3/4R3 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Buletin Problemistic, 2002

3N3N/b1p2RK1/4r1pp/2QPk3/1B2P3/P1P3P1/2P1q3/4R3

#2

13 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Rxe2#
    • 1...Rb6
      • 2.Qd4#
    • 1...Re7
      • 2.Rxe7#
      • 2.Qxe7#
    • 1...Bb8
      • 2.Qd4#
  • Tries
    • 1.Sc6+?
      • 1...Kxe4
        • 2.Rxe2#
        • 2.Rf4#
      • 1...Rxc6!
    • 1.Sxg6+?
      • 1...Kxe4
        • 2.Rxe2#
        • 2.Rf4#
      • 1...Rxg6+!
    • 1.Rf4?
      • threat
        • 2.Sdf7#
        • 2.Shf7#
      • 1...Re7+
        • 2.Qxe7#
      • 1...Rf6!
    • 1.Qxc7+?
      • 1...Rd6
        • 2.Re7#
      • 1...Kxe4!
    • 1.dxe6+?
      • 1...Kxe4
        • 2.Rxe2#
        • 2.Rf4#
      • 1...Bxc5!
    • 1.d6+?
      • 1...Kxe4
        • 2.Rxe2#
        • 2.Rf4#
      • 1...Bxc5!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qxe6#
      • 1...Kxe4
        • 2.Qxe6#
      • 1...Rxe7
        • 2.Rxe7#
      • 1...Qg4
        • 2.Sc6#
      • 1...Qa6
        • 2.Sxg6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • K(b);OGATEB,P-FLIGHT,P_SPINQ(a),XP(G)::R(A),XQ(a)
    • R(c);S_CUTB(f)::QAB1(H)
    • B(f);N_GUARD::QAB1(H)
  • Tries
    • Try
      • S(L);CHECK
      • Refutation
        • R(c);XS(L)
    • Try
      • S(M);CHECK,XP(d)
      • Refutation
        • R(c);CHECK,XS(M)
    • Try
      • R(J);
      • Threat
        • DUALS(2)
      • Vars
        • R(c);CHECK,OGATEB::QAR2(H),XR(c)
      • Refutation
        • R(c);
    • Try
      • Q(H);CHECK,XP(g)
      • Vars
        • R(c);P_SPINR(c)::R(J)
      • Refutation
        • K(b);P-FLIGHT,P_SPINQ(a),XP(G)
    • Try
      • P(I);CHECK,XR(c)
      • Refutation
        • B(f);XQ(H)
    • Try
      • P(I);CHECK
      • Refutation
        • B(f);XQ(H)
  • Actual
    • Q(H);P_PINR(c)
    • Threat
      • QAR1(H),XR(c)
    • Vars
      • K(b);P-FLIGHT,P_SPINQ(a),XP(G)::QAR2(H),XR(c)
      • R(c);N_SPINR(c),OGATE,P_PINR(J),XQ(H)::R(J),XR(c)
      • Q(a);::S(L)
      • Q(a);::S(M),XP(d)
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