MESON Chess Problem Database

Problem Display
PID: 40541 (1K1BQ1n1/1P1pr1b1/2kP3R/1N6/2Pp1p2/qN1n4/2B5/3r4 w - - 0 1)

Viesturs, Nikolai

Recomm., BCF 028. Ty., 1938-1939

1K1BQ1n1/1P1pr1b1/2kP3R/1N6/2Pp1p2/qN1n4/2B5/3r4

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sa7#
    • 1...Qb2
      • 2.Sa7#
    • 1...Qb4
      • 2.Sa7#
    • 1...Qc5
      • 2.Sa5#
    • 1...Qxd6+
      • 2.Rxd6#
    • 1...Qa7+
      • 2.Sxa7#
    • 1...Qa8+
      • 2.bxa8Q#
      • 2.bxa8B#
    • 1...Re4
      • 2.Qxe4#
    • 1...Re5
      • 2.S5xd4#
    • 1...Rf7
      • 2.Qe4#
    • 1...Bf8
      • 2.S5xd4#
    • 1...Se5
      • 2.Be4#
  • Keys
    • 1.Qh5!
      • threat
        • 2.Qd5#
      • 1...Qxd6+
        • 2.Rxd6#
      • 1...Qa7+
        • 2.Sxa7#
      • 1...Qa8+
        • 2.bxa8Q#
        • 2.bxa8B#
      • 1...Qc5
        • 2.Sa5#
      • 1...Re5
        • 2.S5xd4#
      • 1...Be5
        • 2.Qf3#
      • 1...Sb4
        • 2.Qc5#
      • 1...Se5
        • 2.Be4#
      • 1...Sf6
        • 2.S3xd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(b);N_GUARD::S(D)
    • Q(b);N_GUARD,SBLOCK::S(B)
    • Q(b);CHECK,OGATE,P_SPINQ(b),XP(E)::R1(F),XQ(b)
    • Q(b);CHECK,N_GUARD::S(D),XQ(b)
    • Q(b);CHECK,OGATE::PXQ(b)=Q
    • R(h);OGATE::QAB(J),XR(h)
    • R(h);S_CUTB(i)::S(D),XP(d)
    • R(h);OGATE::QAB(J)
    • B(i);N_GUARD::S(D),XP(d)
    • S(c);OGATE::B(A)
  • Actual
    • Q(J);N_PINP(g)
    • Threat
      • QAB1(J)
    • Vars
      • Q(b);CHECK,OGATE,P_SPINQ(b),XP(E)::R1(F),XQ(b)
      • Q(b);CHECK,N_GUARD::S(D),XQ(b)
      • Q(b);CHECK,OGATE::PXQ(b)=Q
      • Q(b);N_GUARD::S(B)
      • R(h);S_CUTB(i)::S(D),XP(d)
      • B(i);P_PINP(E),S_CUTR(h)::QAB(J)
      • S(c);N_GUARD,S_CUTQ(b)::QAR1(J)
      • S(c);OGATE::B(A)
      • S(j);S_CUTB(i)::S(B),XP(d)
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