MESON Chess Problem Database

Problem Display
PID: 241365 (1B2n3/2r5/r3q3/b1Np3R/Rn3kP1/3p1P2/p2N1Q2/1bKB4 w - - 0 1)

Gavrilov, Constantin Grigorievich

Revista Romana de Sah, 1939

1B2n3/2r5/r3q3/b1Np3R/Rn3kP1/3p1P2/p2N1Q2/1bKB4

#2

10 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg4
      • 2.fxg4#
    • 1...Qf5
      • 2.Rxf5#
    • 1...Qg8
      • 2.Rf5#
    • 1...Qe1
      • 2.Rf5#
    • 1...Qe2
      • 2.Rf5#
    • 1...Qe3
      • 2.Rf5#
      • 2.Qh2#
    • 1...Qe4
      • 2.fxe4#
    • 1...Qb6
      • 2.Rf5#
    • 1...Qc6
      • 2.Rf5#
    • 1...Qd6
      • 2.Rf5#
    • 1...Qh6
      • 2.Rf5#
    • 1...Qe7
      • 2.Rf5#
  • Tries
    • 1.Sf1?
      • threat
        • 2.Qg3#
        • 2.Qh2#
      • 1...Qe3+
        • 2.Qxe3#
      • 1...Qxg4
        • 2.Qe3#
        • 2.Qd4#
        • 2.Qd2#
        • 2.fxg4#
      • 1...Qe1
        • 2.Rf5#
      • 1...Qe2
        • 2.Rf5#
        • 2.Qg3#
      • 1...d2+!
  • Keys
    • 1.Se4!
      • threat
        • 2.Qd2#
      • 1...d2+
        • 2.Qxd2#
      • 1...Qxe4
        • 2.fxe4#
      • 1...dxe4
        • 2.fxe4#
      • 1...Qf5
        • 2.Rxf5#
      • 1...Sc2
        • 2.Sxd3#
      • 1...Sc6
        • 2.Sxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(i);OGATE,XP(G)::QAR(D)+P(E),XQ(i)
    • Q(i);N_GUARD::R1(I),XQ(i)
    • Q(i);N_GUARD::R1(I)
    • Q(i);N_GUARD,P_PINB(B)::R1(I)
    • Q(i);N_SPINS(d),OGATE::QAR(D)+P(E),XQ(i)
    • Q(i);N_GUARD,N_SPINR(j)::R1(I)
  • Tries
    • Try
      • S(C);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);CHECK,N_GUARD::QAB1(D),XQ(i)
        • Q(i);N_GUARD,P_PINB(B)::R1(I)
      • Refutation
        • P(c);CHECK
  • Actual
    • S(C);N_PINS(d)
    • Threat
      • QAB(D)
    • Vars
      • P(c);CHECK::QAB(D),XP(c)
      • Q(i);OGATE,XS(C)::QAR(D)+P(E),XQ(i)
      • P(g);OGATE,XS(C)::QAR(D)+P(E),XP(g)
      • Q(i);N_GUARD::R1(I),XQ(i)
      • S(d);N_PINS(H)::S(H),XP(c)
      • S(d);N_PINS(H)::S(H),XQ(i)
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