MESON Chess Problem Database

Problem Display
PID: 207807 (1Q3B2/2pN3B/p2qP3/p5pK/P1k5/4R2R/b1NP4/8 w - - 0 1)

Segers, Marcel

Il Problema, 1934

1Q3B2/2pN3B/p2qP3/p5pK/P1k5/4R2R/b1NP4/8

#2

11 + 7

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Rc3#
    • 1...Bb1
      • 2.Qb3#
    • 1...Bb3
      • 2.Qxb3#
  • Tries
    • 1.Be4?
      • threat
        • 2.Rc3#
      • 1...Qxd2
        • 2.Se5#
        • 2.Qxc7#
      • 1...Qa3
        • 2.Se5#
      • 1...Qb4
        • 2.Se5#
      • 1...Qe5
        • 2.Sxe5#
      • 1...Qd3
        • 2.Se5#
      • 1...Qd4
        • 2.Sa3#
      • 1...Qg3!
    • 1.Re4+?
      • 1...Qd4
        • 2.Rxd4#
      • 1...Kd5!
    • 1.Qxc7+?
      • 1...Kd5
        • 2.Sf6#
      • 1...Qc5
        • 2.Sb6#
        • 2.Qxc5#
      • 1...Qc6
        • 2.Sb6#
        • 2.Qxc6#
      • 1...Qxc7!
    • 1.Qb7?
      • threat
        • 2.Rc3#
      • 1...Qxd2
        • 2.Se5#
        • 2.Qc6#
      • 1...Qc6
        • 2.Qxc6#
      • 1...Qa3
        • 2.Se5#
        • 2.Re4#
        • 2.Qe4#
      • 1...Qg3
        • 2.Bd3#
        • 2.Qe4#
        • 2.Qc6#
      • 1...Qb4
        • 2.Se5#
        • 2.Re4#
        • 2.Qe4#
      • 1...Qe5
        • 2.Sxe5#
        • 2.Bd3#
      • 1...Qd3
        • 2.Se5#
        • 2.Bxd3#
      • 1...Qd4
        • 2.Sa3#
      • 1...c6!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Rc3#
      • 1...Kc5
        • 2.Qxc7#
      • 1...Qxd2
        • 2.Qxc7#
      • 1...Qa3
        • 2.Re4#
      • 1...Qg3
        • 2.Bd3#
      • 1...Qb4
        • 2.Re4#
      • 1...Qe5
        • 2.Bd3#
      • 1...Qd3
        • 2.Bxd3#
      • 1...Qd4
        • 2.Sa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • Q(f);SBLOCK::R1(C)
    • B(a);N_GUARD::QAB1(J)
    • B(a);N_GUARD::QAB1(J),XB(a)
  • Tries
    • Try
      • B(I);
      • Threat
        • R1(C)
      • Vars
        • Q(f);N_GUARD::S(H)
        • Q(f);N_GUARD::S(H),XQ(f)
        • Q(f);N_GUARD,SBLOCK::S(A)
      • Refutation
        • Q(f);
    • Try
      • R(C);CHECK
      • Vars
        • Q(f);N_GUARD,P_SPINQ(f)::R1(C),XQ(f)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(J);CHECK,XP(g)
      • Vars
        • K(b);S_FLIGHT::S(H)
      • Refutation
        • Q(f);XQ(J)
    • Try
      • Q(J);
      • Threat
        • R1(C)
      • Vars
        • Q(f);N_GUARD::QAR2(J),XQ(f)
        • Q(f);N_GUARD,SBLOCK::S(A)
      • Refutation
        • P(g);
  • Actual
    • S(H);
    • Threat
      • R1(C)
    • Vars
      • K(b);P-FLIGHT,P_SPINQ(f)::QAR2(J),XP(g)
      • Q(f);N_GUARD,XP(B)::QAR(J),XP(g)
      • Q(f);N_GUARD::R(C)
      • Q(f);N_GUARD::B(I)
      • Q(f);N_GUARD::B(I),XQ(f)
      • Q(f);N_GUARD,SBLOCK::S(A)
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