MESON Chess Problem Database

Problem Display
PID: 243943 (4Q3/2n5/p5Kb/r3P1pN/2P1k3/1Nq2p2/3RPP2/3b4 w - - 0 1)

Grinblat, Arieh

Sachove umeni (Ceskoslovensky sach), 1959

4Q3/2n5/p5Kb/r3P1pN/2P1k3/1Nq2p2/3RPP2/3b4

#2

9 + 9

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Rd4#
    • 1...Qd4
      • 2.Rxd4#
    • 1...Qxe5
      • 2.Rd4#
    • 1...Qc1
      • 2.Rd4#
    • 1...Qc2
      • 2.Rd4#
    • 1...Qd3
      • 2.exd3#
    • 1...Ra1
      • 2.Sc5#
    • 1...Ra2
      • 2.Sc5#
    • 1...Ra3
      • 2.Sc5#
    • 1...Ra4
      • 2.Sc5#
    • 1...Rc5
      • 2.Sxc5#
    • 1...Rxe5
      • 2.Sc5#
    • 1...Sb5
      • 2.Sc5#
  • Tries
    • 1.Qd7?
      • threat
        • 2.Qf5#
      • 1...Kxe5
        • 2.Qf5#
      • 1...Qxe5
        • 2.Qd3#
      • 1...Rxe5
        • 2.Qg4#
      • 1...Se6!
    • 1.Qe6?
      • threat
        • 2.Qf5#
      • 1...Qxe5
        • 2.Rd4#
      • 1...Rxe5
        • 2.Sc5#
        • 2.Qg4#
      • 1...Sxe6!
    • 1.Qf8?
      • threat
        • 2.Qf5#
      • 1...Kxe5
        • 2.Qf5#
      • 1...Qxe5
        • 2.Qxf3#
      • 1...Rxe5
        • 2.Sg3#
      • 1...Bxf8!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qf5#
      • 1...Kxe5
        • 2.Qf5#
      • 1...Qxe5
        • 2.Qxf3#
      • 1...Rxe5
        • 2.Sg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::R1(A)
    • Q(b);N_GUARD::R1(A),XQ(b)
    • Q(b);N_GUARD,P_SPINQ(b),XP(F)::R1(A)
    • Q(b);OGATE::P(B),XQ(b)
    • R(e);N_GUARD::S(D)
    • R(e);N_GUARD::S(D),XR(e)
    • R(e);N_GUARD,P_SPINR(e),XP(F)::S(D)
    • S(i);S_CUTR(e)::S(D)
  • Tries
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • K(d);P-FLIGHT,XP(F)::QAR1(I)
        • Q(b);N_GUARD,SBLOCK,XP(F)::QAB1(I)
        • R(e);SBLOCK,XP(F)::QAR2(I)
      • Refutation
        • S(i);
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b),XP(F)::R1(A)
      • Refutation
        • S(i);XQ(I)
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • K(d);P-FLIGHT,XP(F)::QAR1(I)
        • Q(b);N_GUARD,SBLOCK,XP(F)::QAB1(I),XP(c)
        • R(e);SBLOCK,XP(F)::S(G)
      • Refutation
        • B(h);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAB1(I)
    • Vars
      • K(d);P-FLIGHT,XP(F)::QAR1(I)
      • Q(b);N_GUARD,SBLOCK,XP(F)::QAB1(I),XP(c)
      • R(e);SBLOCK,XP(F)::S(G)
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