MESON Chess Problem Database

Problem Display
PID: 234890 (N6K/1n6/2k5/1p1R4/1p6/8/4p1Bp/1Q5q w - - 0 1)

Haring, Jacobus

Revista Romana de Sah, 1957

N6K/1n6/2k5/1p1R4/1p6/8/4p1Bp/1Q5q

#2

5 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Tries
    • 1.Rd1+?
      • 1...Kc5
        • 2.Qc2#
        • 2.Qc1#
      • 1...Qxg2!
    • 1.Rd2+?
      • 1...Kc5
        • 2.Qc2#
      • 1...Qxg2!
    • 1.Rd3+?
      • 1...Kc5
        • 2.Qc2#
      • 1...Qxg2!
    • 1.Rd4+?
      • 1...Kc5
        • 2.Qxb4#
      • 1...Qxg2!
    • 1.Rd8+?
      • 1...Kc5
        • 2.Qc2#
      • 1...Qxg2!
    • 1.Qd3?
      • threat
        • 2.Qxb5#
      • 1...Qa1+
        • 2.Re5#
      • 1...Sc5
        • 2.Rd6#
      • 1...Sd6!
    • 1.Qh7?
      • threat
        • 2.Qc7#
        • 2.Qd7#
      • 1...Qxg2
        • 2.Qd7#
      • 1...Sc5
        • 2.Qc7#
      • 1...Sd6
        • 2.Qc7#
      • 1...Qa1+!
    • 1.Qxb4?
      • threat
        • 2.Rd6#
        • 2.Qxb5#
      • 1...Qa1+
        • 2.Rd4#
      • 1...Qxg2
        • 2.Qxb5#
      • 1...Sd6
        • 2.Rxd6#
      • 1...Qb1
        • 2.Rd3#
        • 2.Rd6#
      • 1...Sc5!
  • Keys
    • 1.Qf5!
      • threat
        • 2.Qd7#
        • 2.Qc8#
      • 1...Qa1+
        • 2.Rd4#
      • 1...Qxg2
        • 2.Qd7#
      • 1...Sc5
        • 2.Qc8#
      • 1...Sd6
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • Q(a);XB(B)
    • Try
      • R(C);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR(A)
      • Refutation
        • Q(a);XB(B)
    • Try
      • R(C);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR(A)
      • Refutation
        • Q(a);XB(B)
    • Try
      • R(C);CHECK
      • Vars
        • K(f);P-FLIGHT::QAB1(A),XP(d)
      • Refutation
        • Q(a);XB(B)
    • Try
      • R(C);CHECK
      • Vars
        • K(f);P-FLIGHT::QAR(A)
      • Refutation
        • Q(a);XB(B)
    • Try
      • Q(A);
      • Threat
        • QAB1(A),XP(e)
      • Vars
        • Q(a);CHECK,N_GUARD::B(B)+R(C)
        • S(g);SBLOCK::B(B)+R(C),DCHECK
      • Refutation
        • S(g);
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);XB(B)::QAB1(A)
        • S(g);::QAR1(A)
      • Refutation
        • Q(a);CHECK
    • Try
      • Q(A);XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);CHECK,N_GUARD::B(B)+R(C)
        • Q(a);XB(B)::QAB1(A),XP(e)
        • S(g);::B(B)+R(C),DCHECK,XS(g)
      • Refutation
        • S(g);
  • Actual
    • Q(A);
    • Threat
      • DUALS(2)
    • Vars
      • Q(a);CHECK,N_GUARD::B(B)+R(C)
      • Q(a);XB(B)::QAB1(A)
      • S(g);::QAR2(A)
      • S(g);SBLOCK::B(B)+R(C),DCHECK
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