MESON Chess Problem Database

Problem Display
PID: 242225 (1B1r1b2/4N1n1/2nr4/8/4k1B1/KP1NP3/5P2/1Q6 w - - 0 1)

Kisis, Imants J

Schach, 1970

1B1r1b2/4N1n1/2nr4/8/4k1B1/KP1NP3/5P2/1Q6

#2

9 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd3
      • 2.Qh1#
    • 1...Rd4
      • 2.Sc5#
    • 1...Rd5
      • 2.Sc5#
    • 1...Re6
      • 2.Sc5#
    • 1...Rf6
      • 2.Sc5#
    • 1...Rg6
      • 2.Sc5#
    • 1...Rh6
      • 2.Sc5#
    • 1...R6d7
      • 2.Sc5#
    • 1...Se5
      • 2.Sc5#
  • Tries
    • 1.Se1+?
      • 1...Rd3
        • 2.Bf3#
      • 1...Ke5!
    • 1.Sb2+?
      • 1...Rd3
        • 2.Qh1#
      • 1...Ke5!
    • 1.Sb4+?
      • 1...Rd3
        • 2.Qh1#
      • 1...Ke5!
    • 1.Sf4+?
      • 1...Rd3
        • 2.Qh1#
      • 1...Ke5!
    • 1.Se5+?
      • 1...Rd3
        • 2.Bf3#
        • 2.Qh1#
      • 1...Kxe5!
  • Keys
    • 1.Sd5!
      • threat
        • 2.Sc3#
      • 1...Rxd5+
        • 2.Sc5#
      • 1...Re6+
        • 2.S3b4#
      • 1...Rf6+
        • 2.S3b4#
      • 1...Rg6+
        • 2.S3b4#
      • 1...Rh6+
        • 2.S3b4#
      • 1...R6d7+
        • 2.S3b4#
      • 1...Kxd5
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(c);P_PINP(D),P_PINS(H),P_SPINR(c),SBLOCK,XS(E)::QAB(A)
    • R(c);P_PINS(H)::QAB(A)+S(E),DCHECK
    • S(b);SBLOCK::QAB(A)+S(E),DCHECK
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • R(c);P_PINP(D),P_PINS(H),P_SPINR(c)::B(G)
      • Refutation
        • K(a);P-FLIGHT,P_SPINR(c)
    • Try
      • S(E);CHECK
      • Vars
        • R(c);P_PINP(D),P_PINS(H),P_SPINR(c)::QAB(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINR(c)
    • Try
      • S(E);CHECK
      • Vars
        • R(c);P_PINP(D),P_SPINR(c)::QAB(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINR(c)
    • Try
      • S(E);CHECK
      • Vars
        • R(c);P_PINP(D),P_PINS(H),P_SPINR(c)::QAB(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINR(c)
    • Try
      • S(E);CHECK
      • Refutation
        • K(a);P-FLIGHT,P_SPINR(c),XS(E)
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • R(c);CHECK,SBLOCK,XS(H)::QAB(A)+S(E),DCHECK
      • R(c);CHECK::QAB(A)+S(E)
      • K(a);S_FLIGHT,XS(H)::QAB(A)
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