MESON Chess Problem Database

Problem Display
PID: 19463 (8/8/6p1/3p2Kp/3P3R/p2kN3/P5nQ/B3RN1b w - - 0 1)

Pituk, Alexander

4th Prize, Sachove umeni (Ceskoslovensky sach), 1954/I

8/8/6p1/3p2Kp/3P3R/p2kN3/P5nQ/B3RN1b

#2

9 + 7

3105 FIDE Album (1945-1955) 1964
56 The Problemist 2002
133 The Problemist Supplement 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe1
      • 2.Qd2#
    • 1...Sxe3
      • 2.Qe2#
    • 1...Sf4
      • 2.Qc2#
    • 1...Sxh4
      • 2.Qc2#
  • Tries
    • 1.Kf6?
      • 1...Sxe1
        • 2.Qd2#
      • 1...Sxe3
        • 2.Qe2#
      • 1...Sxh4
        • 2.Qc2#
      • 1...Sf4
        • 2.Qc2#
      • 1...g5!
    • 1.Kh6?
      • 1...Sxe1
        • 2.Qd2#
      • 1...Sxe3
        • 2.Qe2#
      • 1...Sxh4
        • 2.Qc2#
      • 1...Sf4
        • 2.Qc2#
      • 1...g5!
    • 1.Sg3?
      • 1...Sxe1
        • 2.Qe2#
      • 1...Sxe3
        • 2.Qe2#
      • 1...Sxh4
        • 2.Qc2#
        • 2.Qe2#
      • 1...Sf4
        • 2.Qc2#
      • 1...Kd2!
    • 1.Bb2?
      • 1...Sxe1
        • 2.Qd2#
      • 1...Sxe3
        • 2.Qe2#
      • 1...Sxh4
        • 2.Qc2#
      • 1...Sf4
        • 2.Qc2#
      • 1...axb2!
    • 1.Rc1?
      • 1...Sxe3
        • 2.Rc3#
        • 2.Qd2#
      • 1...Sxh4
        • 2.Qc2#
      • 1...Se1
        • 2.Rd1#
        • 2.Rc3#
        • 2.Qd2#
      • 1...Sf4
        • 2.Qc2#
      • 1...Ke2!
    • 1.Rf4?
      • 1...Sxe1
        • 2.Qd2#
      • 1...Sxe3
        • 2.Qe2#
      • 1...Sxf4
        • 2.Qc2#
      • 1...Sh4
        • 2.Rd1#
        • 2.Qc2#
        • 2.Qd2#
        • 2.Qe2#
      • 1...h4!
    • 1.Qc7?
      • threat
        • 2.Qc2#
        • 2.Qc3#
      • 1...Sxe3
        • 2.Rxe3#
        • 2.Qc3#
      • 1...Sxh4
        • 2.Qc2#
      • 1...Sf4
        • 2.Qc2#
      • 1...Sxe1!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Qb1#
        • 2.Qb3#
        • 2.Qb5#
      • 1...Sxe1
        • 2.Qb5#
      • 1...Sxe3
        • 2.Qb3#
      • 1...Sxh4
        • 2.Qb1#
      • 1...Sf4
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • S(b);OGATE,XR(B)::QAR1(E)
    • S(b);OGATE,XS(F)::QAB1(E)
    • S(b);OGATE::QAB1(E)
    • S(b);OGATE,XR(H)::QAB1(E)
  • Tries
    • Try
      • K(I);S_FLIGHT
      • Vars
        • S(b);OGATE,XR(B)::QAR1(E)
        • S(b);OGATE,XS(F)::QAB1(E)
        • S(b);OGATE,XR(H)::QAB1(E)
        • S(b);OGATE::QAB1(E)
      • Refutation
        • P(g);
    • Try
      • K(I);S_FLIGHT
      • Vars
        • S(b);OGATE,XR(B)::QAR1(E)
        • S(b);OGATE,XS(F)::QAB1(E)
        • S(b);OGATE,XR(H)::QAB1(E)
        • S(b);OGATE::QAB1(E)
      • Refutation
        • P(g);
    • Try
      • S(C);
      • Vars
        • S(b);OGATE,XR(B)::QAB1(E)
        • S(b);OGATE,XS(F)::QAB1(E)
        • S(b);OGATE::QAB1(E)
      • Refutation
        • K(d);P-FLIGHT,P_SPINS(b)
    • Try
      • B(A);
      • Vars
        • S(b);OGATE,XR(B)::QAR1(E)
        • S(b);OGATE,XS(F)::QAB1(E)
        • S(b);OGATE,XR(H)::QAB1(E)
        • S(b);OGATE::QAB1(E)
      • Refutation
        • P(c);XB(A)
    • Try
      • R(B);
      • Vars
        • S(b);OGATE,XR(H)::QAB1(E)
        • S(b);OGATE::QAB1(E)
      • Refutation
        • K(d);P_SPINS(b),S_FLIGHT
    • Try
      • R(H);
      • Vars
        • S(b);OGATE,XR(B)::QAR1(E)
        • S(b);OGATE,XS(F)::QAB1(E)
        • S(b);OGATE,XR(H)::QAB1(E)
      • Refutation
        • P(f);
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);XR(H)::QAB1(E)
        • S(b);::QAB1(E)
      • Refutation
        • S(b);XR(B)
  • Actual
    • Q(E);
    • Threat
      • DUALS(3)
    • Vars
      • S(b);XR(B)::QAB(E)
      • S(b);XS(F)::QAR2(E)
      • S(b);XR(H)::QAB(E)
      • S(b);::QAB(E)
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