MESON Chess Problem Database

Problem Display
PID: 85613 (B3N3/3P2rb/3Pp2b/1RN1kn1Q/2p4p/K4nq1/P2P1R1B/5r2 w - - 0 1)

Petrovic, Nenad

Problem (Zagreb), 1953

B3N3/3P2rb/3Pp2b/1RN1kn1Q/2p4p/K4nq1/P2P1R1B/5r2

#2

12 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Sxe6#
    • 1...Qf4
      • 2.Sb3#
    • 1...Bf4
      • 2.Sb3#
    • 1...Se1+
      • 2.Sb3#
    • 1...Sg1+
      • 2.Sb3#
    • 1...Sxd2+
      • 2.Sb3#
    • 1...Sxh2+
      • 2.Sb3#
    • 1...Sd4+
      • 2.Sd3#
    • 1...Sg5+
      • 2.Sb3#
  • Tries
    • 1.Se4+?
      • 1...Kf4
        • 2.Qxf3#
      • 1...Kd4!
    • 1.Re2+?
      • 1...Kd4
        • 2.Re4#
      • 1...Kf4
        • 2.Sxe6#
        • 2.Re4#
      • 1...Be3!
    • 1.Qg4?
      • threat
        • 2.Sb3#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sa6#
        • 2.Sb7#
        • 2.Qe4#
      • 1...Se1+
        • 2.Sb3#
        • 2.Sd3#
      • 1...Sg1+
        • 2.Sb3#
        • 2.Sd3#
      • 1...Sxd2+
        • 2.Sb3#
        • 2.Sd3#
      • 1...Sxh2+
        • 2.Sb3#
        • 2.Sd3#
      • 1...S3d4+
        • 2.Sd3#
      • 1...Sg5+
        • 2.Sb3#
        • 2.Sd3#
      • 1...Sxd6
        • 2.Sd3#
      • 1...Qf4
        • 2.Sb3#
      • 1...Bf4
        • 2.Sb3#
      • 1...Be3
        • 2.Sd3#
        • 2.Qe4#
      • 1...Rb1
        • 2.Sb3#
        • 2.Sd3#
        • 2.Qe4#
      • 1...Re1
        • 2.Sb3#
        • 2.Sd3#
        • 2.Sa4#
        • 2.Sa6#
        • 2.Sb7#
      • 1...Se3
        • 2.Sd3#
      • 1...S5d4
        • 2.Sd3#
      • 1...Se7
        • 2.Sd3#
      • 1...Rxg4!
  • Keys
    • 1.Qxf3!
      • threat
        • 2.Sb3#
      • 1...Kd4
        • 2.Sxe6#
      • 1...Sxd6
        • 2.Qc3#
      • 1...Be3
        • 2.Qe4#
      • 1...Se3
        • 2.Qf6#
      • 1...Sd4
        • 2.Sd3#
      • 1...Se7
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 9
  • Sets
    • K(f);N_SPINS(g),P_SPINS(b),S_FLIGHT::S(G),XP(h)
    • Q(c);::R(F)+S(G)
    • B(i);N_SPINQ(c),SBLOCK::R(F)+S(G)
    • S(b);CHECK::R(F)+S(G)
    • S(b);CHECK,XP(B)::R(F)+S(G)
    • S(b);CHECK,N_SPINQ(c),XB(D)::R(F)+S(G)
    • S(b);CHECK,SBLOCK::R(F)+S(G),DCHECK
    • S(b);CHECK,N_SPINS(g)::R(F)+S(G)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(f);N_SPINS(g),P_SPINS(b),S_FLIGHT::QAR1(H),XS(b)
      • Refutation
        • K(f);N_SPINQ(c),N_SPINS(g),S_FLIGHT
    • Try
      • R(C);CHECK
      • Vars
        • K(f);N_SPINQ(c),N_SPINS(g),S_FLIGHT::R1(C)
      • Refutation
        • B(i);P_SPINB(i)
    • Try
      • Q(H);N_PINS(g)
      • Threat
        • DUALS(6)
      • Vars
        • S(b);CHECK::R(F)+S(G),DCHECK
        • S(g);XP(I)::R(F)+S(G),DCHECK
        • Q(c);::R(F)+S(G)
        • B(i);N_SPINQ(c)::R(F)+S(G)
        • S(g);::R(F)+S(G),DCHECK
      • Refutation
        • R(j);XQ(H)
  • Actual
    • Q(H);N_PINS(g),P_SPINQ(H),XS(b)
    • Threat
      • R(F)+S(G)
    • Vars
      • K(f);N_SPINQ(c),S_FLIGHT::S(G),XP(h)
      • S(g);N_GUARD,XP(I)::QAB(H)
      • B(i);N_PINQ(H)::QAR1(H)
      • S(g);N_PINQ(H)::QAB1(H)
      • S(g);SBLOCK::R(F)+S(G),DCHECK
      • S(g);N_GUARD::QAB(H)
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