MESON Chess Problem Database

Problem Display
PID: 145854 (2Qr2B1/3ppb1N/7R/R1qk4/n2P4/b1pK4/1rPN4/8 w - - 0 1)

Heyl, Peter

Die Schwalbe, 2012

2Qr2B1/3ppb1N/7R/R1qk4/n2P4/b1pK4/1rPN4/8

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa5
      • 2.Qc4#
    • 1...Qb5+
      • 2.Qc4#
    • 1...Ra2
      • 2.Qb7#
    • 1...Rxc2
      • 2.Qb7#
    • 1...Rb7
      • 2.Qxb7#
    • 1...Re8
      • 2.Qxd7#
    • 1...Rf8
      • 2.Qxd7#
    • 1...Rxg8
      • 2.Qxd7#
    • 1...Bb4
      • 2.Qb7#
    • 1...Sb6
      • 2.Qb7#
    • 1...cxd2
      • 2.c4#
    • 1...e5
      • 2.Bxf7#
  • Tries
    • 1.Rd6+?
      • 1...exd6
        • 2.Bxf7#
      • 1...Kxd6!
    • 1.Qc7?
      • threat
        • 2.Qe5#
      • 1...Qb5+
        • 2.Qc4#
      • 1...Be6
        • 2.Rh5#
      • 1...e5
        • 2.Bxf7#
        • 2.Rd6#
        • 2.Qxe5#
        • 2.Qd6#
      • 1...e6
        • 2.Sf6#
      • 1...d6!
    • 1.Qa8+?
      • 1...Rb7
        • 2.Qxb7#
      • 1...Rxa8!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Se3#
      • 1...Qb5
        • 2.Qb7#
      • 1...Be6
        • 2.Rh5#
      • 1...e6
        • 2.Sf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 11
  • Sets
    • Q(e);N_SPINQ(e),OGATE,XR(E)::QAB1(H)
    • Q(e);CHECK,OGATE::QAB1(H)
    • R(a);N_GUARD::QAB(H)
    • R(a);N_GUARD,XP(A)::QAB(H)
    • R(a);N_GUARD::QAB(H),XR(a)
    • R(j);N_GUARD::QAR2(H),XP(g)
    • R(j);N_GUARD,N_SPINB(i),XB(I)::QAR2(H),XP(g)
    • B(b);S_CUTR(a)::QAB(H)
    • S(d);S_CUTR(a)::QAB(H)
    • P(c);OGATE,XS(B)::P(A)
    • P(h);N_GUARD::B(I),XB(i)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • P(h);SBLOCK,XR(F)::B(I),XB(i)
      • Refutation
        • K(f);N_SPINB(i),N_SPINQ(e),P-FLIGHT,XR(F)
    • Try
      • Q(H);
      • Threat
        • QAR1(H)
      • Vars
        • Q(e);CHECK,OGATE::QAB1(H)
        • B(i);S_CUTP(h)::R(F)
        • P(h);N_GUARD,N_SPINB(i),SBLOCK::S(G)
      • Refutation
        • P(g);
    • Try
      • Q(H);CHECK
      • Vars
        • R(a);N_GUARD,P_SPINR(a)::QAB(H),XR(a)
      • Refutation
        • R(j);XQ(H)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • Q(e);P_PINS(B),S_CUTR(a)::QAB(H)
      • B(i);S_CUTP(h)::R(F)
      • P(h);N_GUARD,N_SPINB(i),SBLOCK::S(G)
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