MESON Chess Problem Database

Problem Display
PID: 233986 (2QbN1B1/2B1p2n/Rrn4K/1pk5/3RP3/8/1N1P4/8 w - - 0 1)

Guttman, Newman

Rudenko, Valentin Fedorovich

Chess Life, 1963

2QbN1B1/2B1p2n/Rrn4K/1pk5/3RP3/8/1N1P4/8

#2

10 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb4+
      • 2.Bxb6#
    • 1...Sxd4+
      • 2.Bd6#
    • 1...Sa5+
      • 2.Bxb6#
    • 1...Se5+
      • 2.Bxb6#
    • 1...Sa7+
      • 2.Bxb6#
    • 1...Sb8+
      • 2.Bxb6#
    • 1...b4
      • 2.Rd5#
  • Tries
    • 1.Be5?
      • threat
        • 2.Sd3#
      • 1...b4
        • 2.Rd5#
      • 1...Rxa6!
    • 1.Qe6?
      • threat
        • 2.Qd5#
      • 1...Kxd4
        • 2.Qd5#
      • 1...Sxd4
        • 2.Sd3#
      • 1...Sb4
        • 2.Qxb6#
      • 1...Sa5
        • 2.Qxb6#
      • 1...Se5
        • 2.Qxb6#
      • 1...Sa7
        • 2.Qxb6#
      • 1...Sb8
        • 2.Qxb6#
      • 1...Sf6!
  • Keys
    • 1.Rb4!
      • threat
        • 2.Sd3#
      • 1...Sxb4+
        • 2.Bxb6#
      • 1...Sd4+
        • 2.Bd6#
      • 1...Sa5+
        • 2.Bd6#
      • 1...Se5+
        • 2.Bd6#
      • 1...Sa7+
        • 2.Bd6#
      • 1...Sb8+
        • 2.Bd6#
      • 1...Kxb4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • S(d);CHECK::QAR(H)+B(G),DCHECK,XR(c)
    • S(d);CHECK,SBLOCK,XR(C)::QAR(H)+B(G),DCHECK
    • P(a);SBLOCK::R1(C)
  • Tries
    • Try
      • B(G);P_PINS(d)
      • Threat
        • S(A)
      • Vars
        • P(a);SBLOCK::R1(C)
      • Refutation
        • R(c);XR(E)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • K(b);S_FLIGHT,XR(C)::QAR1(H)
        • S(d);P_PINQ(H),SBLOCK,XR(C)::S(A)
        • S(d);OGATE,P_PINQ(H)::QAB1(H),XR(c)
      • Refutation
        • S(f);
  • Actual
    • R(C);
    • Threat
      • S(A)
    • Vars
      • S(d);CHECK,SBLOCK,XR(C)::QAR(H)+B(G),DCHECK,XR(c)
      • S(d);CHECK::QAR(H)+B(G),DCHECK
      • K(b);S_FLIGHT,XR(C)::S(A)
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