MESON Chess Problem Database

Problem Display
PID: 180363 (2R1bq2/2pP4/4N3/1B5r/1p1PP3/2kp2BR/Q4p2/1Knnb3 w - - 0 1)

Lider, Valentin Viktorovich

1st Comm., Sredba na Solidarnosta, 1976

2R1bq2/2pP4/4N3/1B5r/1p1PP3/2kp2BR/Q4p2/1Knnb3

#2

10 + 11

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Qc4#
    • 1...Sb2
      • 2.Qxb2#
    • 1...Se3
      • 2.Qb2#
    • 1...f1B
      • 2.Bxe1#
    • 1...d2
      • 2.Qc4#
      • 2.Qc2#
  • Tries
    • 1.Bf4?
      • threat
        • 2.Qc4#
        • 2.Qc2#
      • 1...Qxf4
        • 2.Qc2#
      • 1...Rxh3
        • 2.Qc4#
      • 1...Rxb5
        • 2.Qc2#
      • 1...Sxa2
        • 2.Rxd3#
      • 1...Qc5
        • 2.Qc2#
      • 1...Rc5
        • 2.Qc2#
      • 1...Sb3
        • 2.Rxd3#
        • 2.Qc2#
      • 1...Sb2
        • 2.Qxb2#
      • 1...Se3
        • 2.Qb2#
      • 1...b3!
    • 1.Be5?
      • threat
        • 2.Qc2#
      • 1...Rxh3
        • 2.d5#
      • 1...Sxa2
        • 2.Rxd3#
      • 1...Sb2
        • 2.Qxb2#
      • 1...Qf3
        • 2.Rxc7#
      • 1...Se3
        • 2.Qb2#
      • 1...b3!
    • 1.Bd6?
      • threat
        • 2.Qc2#
      • 1...Rxh3
        • 2.Rxc7#
      • 1...Sxa2
        • 2.Rxd3#
      • 1...Sb2
        • 2.Qxb2#
      • 1...Se3
        • 2.Qb2#
      • 1...b3
        • 2.Qa5#
      • 1...Qf3!
  • Keys
    • 1.Bxc7!
      • threat
        • 2.Qc2#
      • 1...Rxh3
        • 2.Bd6#
      • 1...Sxa2
        • 2.Rxd3#
      • 1...Sb2
        • 2.Qxb2#
      • 1...b3
        • 2.Ba5#
      • 1...Qf3
        • 2.Be5#
      • 1...Se3
        • 2.Qb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(c);SBLOCK::QAR1(B)
    • S(b);N_GUARD::QAB1(B),XS(b)
    • S(b);N_GUARD::QAB1(B)
    • P(d);OGATE::B(C),XB(c)
  • Tries
    • Try
      • B(C);N_PINP(i),P_PINP(f)
      • Threat
        • DUALS(2)
      • Vars
        • Q(k);XB(C)::QAR1(B)
        • R(h);N_SPINP(f),P_SPINP(i),XR(D)::QAR1(B)
        • R(h);XB(G)::QAR1(B)
        • S(a);N_GUARD,XQ(B)::R1(D),XP(f)
        • Q(k);::QAR1(B)
        • R(h);::QAR1(B)
        • S(b);N_GUARD::QAB1(B),XS(b)
        • S(b);N_GUARD,N_SPINP(f),P_SPINP(i)::QAB1(B)
      • Refutation
        • P(g);
    • Try
      • B(C);N_PINP(i),P_PINP(f)
      • Threat
        • QAR1(B)
      • Vars
        • R(h);N_GUARD,N_SPINP(f),P_SPINP(i),XR(D)::B(C)+P(E)
        • S(a);N_GUARD,XQ(B)::R1(D),XP(f)
        • S(b);N_GUARD::QAB1(B),XS(b)
        • Q(k);N_GUARD,N_SPINP(f),P_SPINP(i)::R(J),XP(i)
        • S(b);N_GUARD,N_SPINP(f),P_SPINP(i)::QAB1(B)
      • Refutation
        • P(g);
    • Try
      • B(C);N_PINP(i),P_PINP(f)
      • Threat
        • QAR1(B)
      • Vars
        • R(h);N_GUARD,N_SPINP(f),P_SPINP(i),XR(D)::R(J),XP(i)
        • S(a);N_GUARD,XQ(B)::R1(D),XP(f)
        • S(b);N_GUARD::QAB1(B),XS(b)
        • S(b);N_GUARD,N_SPINP(f),P_SPINP(i)::QAB1(B)
        • P(g);OGATEB,SBLOCK::QAB(B)
      • Refutation
        • Q(k);N_SPINP(f),P_SPINP(i)
  • Actual
    • B(C);P_PINP(f),XP(i)
    • Threat
      • QAR1(B)
    • Vars
      • R(h);N_GUARD,N_SPINP(f),XR(D)::R(J)+B(C)
      • S(a);N_GUARD,XQ(B)::R1(D),XP(f)
      • S(b);N_GUARD::QAB1(B),XS(b)
      • P(g);::R(J)+B(C),DCHECK
      • Q(k);N_GUARD,N_SPINP(f)::R(J)+B(C)
      • S(b);N_GUARD,N_SPINP(f)::QAB1(B)
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