MESON Chess Problem Database

Problem Display
PID: 103674 (8/1p6/brPN4/B1k5/3RB2K/4N3/8/n2Q4 w - - 0 1)

Orban, Tibor

Szocialista orszagok, 1975-1977

8/1p6/brPN4/B1k5/3RB2K/4N3/8/n2Q4

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rb5
      • 2.Rc4#
    • 1...Rxc6
      • 2.Rd5#
    • 1...Bc4
      • 2.Rxc4#
    • 1...Bb5
      • 2.Bb4#
  • Tries
    • 1.Ra4?
      • threat
        • 2.Qd4#
        • 2.Qd5#
      • 1...bxc6
        • 2.Qd4#
      • 1...Rb4
        • 2.Qd5#
      • 1...Bc4
        • 2.Rxc4#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sb3
        • 2.Qd5#
      • 1...Bd3!
    • 1.Rb4?
      • threat
        • 2.Qd4#
        • 2.Qd5#
      • 1...Rxb4
        • 2.Qd5#
      • 1...bxc6
        • 2.Qd4#
      • 1...Bc4
        • 2.Rxc4#
      • 1...Sc2
        • 2.Qd5#
      • 1...Sb3
        • 2.Qd5#
      • 1...Bd3!
    • 1.Qc2+?
      • 1...Kxd4
        • 2.Qc3#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Sxc2!
    • 1.Qa4?
      • threat
        • 2.Rd5#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Rb5
        • 2.Qc4#
      • 1...Bb5
        • 2.Qb4#
      • 1...bxc6!
    • 1.Qc1+?
      • 1...Kxd4
        • 2.Qc3#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Sc2!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Qh5#
      • 1...Kxb5
        • 2.Qh5#
      • 1...Rxb5
        • 2.Rc4#
      • 1...Bxb5
        • 2.Bb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(d);S_CUTB(c)::R1(C)
    • R(d);SBLOCK,XP(G)::R1(C)
    • B(c);N_GUARD::R1(C),XB(c)
    • B(c);S_CUTR(d)::B(F)
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • P(e);XP(G)::QAB1(A)
        • R(d);P_PINB(D)::QAR1(A)
        • B(c);N_GUARD::R1(C),XB(c)
        • S(a);::QAR1(A)
      • Refutation
        • B(c);
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • R(d);P_PINB(D),XR(C)::QAR1(A)
        • P(e);XP(G)::QAB1(A)
        • B(c);N_GUARD::R1(C),XB(c)
        • S(a);::QAR1(A)
      • Refutation
        • B(c);
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(C)::QAB1(A)
        • B(c);N_GUARD,P_SPINB(c)::QAR1(A),XB(c)
      • Refutation
        • S(a);XQ(A)
    • Try
      • Q(A);
      • Threat
        • R1(C)
      • Vars
        • B(c);N_GUARD::QAR1(A),XB(c)
        • R(d);S_CUTB(c)::QAR1(A)
        • B(c);S_CUTR(d)::QAB1(A)
      • Refutation
        • P(e);XP(G)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);S_FLIGHT,XR(C)::QAB1(A)
        • B(c);N_GUARD,P_SPINB(c)::QAR1(A),XB(c)
      • Refutation
        • S(a);P_SPINS(a)
  • Actual
    • S(H);
    • Threat
      • QAR(A)
    • Vars
      • K(b);P-FLIGHT,XS(H)::QAR(A)
      • R(d);SBLOCK,XS(H)::R1(C)
      • B(c);SBLOCK,XS(H)::B(F)
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