MESON Chess Problem Database

Problem Display
PID: 144406 (8/K2B2p1/nP4p1/N1Pk1p1R/3pNQ2/qP1RP2b/2nB4/8 w - - 0 1)

Brummelman, Derk Hendrikus (AKA Bruma, DH)

To Mat, 1957

8/K2B2p1/nP4p1/N1Pk1p1R/3pNQ2/qP1RP2b/2nB4/8

#2

12 + 9

422 Suomen Tehtavaniekat 1991

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Rxd4#
    • 1...Se1
      • 2.Rxd4#
    • 1...Scb4
      • 2.Rxd4#
    • 1...Sxc5
      • 2.Sc3#
  • Tries
    • 1.Sf2?
      • threat
        • 2.Qd6#
      • 1...Kxc5
        • 2.Qe5#
      • 1...Qxc5
        • 2.e4#
      • 1...Sxc5!
    • 1.Sg3?
      • threat
        • 2.Qd6#
      • 1...Kxc5
        • 2.Qe5#
      • 1...Qxc5
        • 2.e4#
      • 1...Sxc5!
    • 1.Sf6+?
      • 1...Kxc5
        • 2.Sb7#
        • 2.Qe5#
      • 1...gxf6!
    • 1.exd4?
      • threat
        • 2.Sc3#
        • 2.Qe5#
      • 1...Qxc5
        • 2.Qe5#
      • 1...Qxb3
        • 2.Qe5#
      • 1...Qxa5
        • 2.Qe5#
      • 1...Qb2
        • 2.Qe5#
      • 1...Qb4
        • 2.Qe5#
      • 1...Qa1
        • 2.Qe5#
      • 1...Sxd4!
  • Keys
    • 1.Sg5!
      • threat
        • 2.Qd6#
      • 1...Kxc5
        • 2.Qe5#
      • 1...Qxc5
        • 2.Be6#
      • 1...Sxc5
        • 2.Bc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • S(a);N_GUARD::R1(C),XP(d)
    • S(g);P_PINS(G),SBLOCK,XP(H)::S(E)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAR1(F)
      • Vars
        • K(e);N_SPINP(d),P-FLIGHT,P_SPINP(f),XP(H)::QAR2(F)
        • Q(b);P_PINP(J),SBLOCK,XP(H)::P(D)
      • Refutation
        • S(g);P_PINS(G),XP(H)
    • Try
      • S(E);
      • Threat
        • QAR1(F)
      • Vars
        • K(e);N_SPINP(d),P-FLIGHT,P_SPINP(f),XP(H)::QAR2(F)
        • Q(b);P_PINP(J),SBLOCK,XP(H)::P(D)
      • Refutation
        • S(g);P_PINS(G),XP(H)
    • Try
      • S(E);CHECK
      • Refutation
        • P(i);XS(E)
    • Try
      • P(D);P_PINP(f),XP(d)
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);P_PINP(J),XP(H)::QAR1(F)
        • Q(b);XP(B)::QAR1(F)
        • Q(b);XS(G)::QAR1(F)
        • Q(b);::QAR1(F)
      • Refutation
        • S(a);P_SPINS(a),XP(D)
  • Actual
    • S(E);
    • Threat
      • QAR1(F)
    • Vars
      • K(e);N_SPINP(d),P-FLIGHT,XP(H)::QAR2(F)
      • Q(b);P_PINP(J),SBLOCK,XP(H)::B(L)
      • S(g);P_PINS(G),SBLOCK,XP(H)::B(L)
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