MESON Chess Problem Database

Problem Display
PID: 233420 (b3N3/2pQP3/pq6/r7/1p1Pk1Pp/3pP1PK/2R3P1/1BB1Nrb1 w - - 0 1)

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Freie Presse, 1997

b3N3/2pQP3/pq6/r7/1p1Pk1Pp/3pP1PK/2R3P1/1BB1Nrb1

#2

13 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd4
      • 2.Qxd4#
    • 1...Rf3
      • 2.gxf3#
    • 1...dxc2
      • 2.Bxc2#
    • 1...d2
      • 2.Rc3#
  • Tries
    • 1.Rf2?
      • threat
        • 2.Bxd3#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Rxe1
        • 2.Rf4#
      • 1...Qb5
        • 2.Sf6#
      • 1...Ra3
        • 2.Qf5#
      • 1...Qd6!
    • 1.Rc6?
      • threat
        • 2.Bxd3#
      • 1...Qxd4
        • 2.Qxd4#
      • 1...Rxe1
        • 2.Sf6#
      • 1...Ra3
        • 2.Qe6#
      • 1...Qb5!
    • 1.Qe6+?
      • 1...Re5
        • 2.Qxe5#
      • 1...Qxe6!
  • Keys
    • 1.Rc5!
      • threat
        • 2.Bxd3#
      • 1...Rxe1
        • 2.Qf5#
      • 1...Qb5
        • 2.Qe6#
      • 1...Ra3
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • Q(i);OGATE,XP(I)::QAR1(K),XQ(i)
    • R(a);OGATE,P_PINP(G)::P(E),XR(a)
    • P(c);OGATE,P_SPINP(c),XR(D)::B(A),XP(c)
    • P(c);OGATEB::B(A)+R(D)
  • Tries
    • Try
      • R(D);P_PINP(c)
      • Threat
        • B(A),XP(c)
      • Vars
        • Q(i);OGATE,XP(I)::QAR1(K),XQ(i)
        • R(a);N_GUARD,XS(C)::R1(D)
        • Q(i);N_GUARD::S(M)
        • R(g);N_GUARD::QAB1(K)
      • Refutation
        • Q(i);
    • Try
      • R(D);P_PINP(c)
      • Threat
        • B(A),XP(c)
      • Vars
        • Q(i);OGATE,XP(I)::QAR1(K),XQ(i)
        • R(a);N_GUARD,XS(C)::S(M)
        • R(g);N_GUARD::QAR2(K)
      • Refutation
        • Q(i);
    • Try
      • Q(K);CHECK
      • Vars
        • R(g);N_GUARD,P_SPINR(g)::QAR1(K),XR(g)
      • Refutation
        • Q(i);P_PINP(J),XQ(K)
  • Actual
    • R(D);P_PINP(c)
    • Threat
      • B(A),XP(c)
    • Vars
      • R(a);N_GUARD,XS(C)::QAB1(K)
      • Q(i);N_GUARD::QAR2(K)
      • R(g);N_GUARD::R1(D)
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