MESON Chess Problem Database

Problem Display
PID: 261455 (5b2/3P3B/1K2prn1/1Np1Brp1/1N2kp2/1P6/1Q1pPPP1/1b1RRn2 w - - 0 1)

Prins, Hendrik

Neue Zurcher Zeitung, 2003

5b2/3P3B/1K2prn1/1Np1Brp1/1N2kp2/1P6/1Q1pPPP1/1b1RRn2

#2

13 + 12

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe5
      • 2.Qxb1#
    • 1...Bd3
      • 2.exd3#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Bh6
      • 2.Sd6#
    • 1...Bg7
      • 2.Sd6#
    • 1...Se3
      • 2.f3#
    • 1...Se7
      • 2.Sd6#
    • 1...f3
      • 2.exf3#
    • 1...cxb4
      • 2.Qd4#
    • 1...c4
      • 2.Qd4#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Qxb1#
      • 1...Bxd6
        • 2.Sxd6#
      • 1...dxe1S
        • 2.Sc3#
      • 1...cxb4
        • 2.Qd4#
      • 1...Ba2
        • 2.Qc2#
      • 1...Bc2
        • 2.Qxc2#
      • 1...Bd3
        • 2.exd3#
      • 1...Se3
        • 2.f3#
      • 1...Se5
        • 2.Qxe5#
      • 1...Rd5!
    • 1.d8Q?
      • threat
        • 2.Qa8#
      • 1...Rxe5
        • 2.Qxb1#
      • 1...Sxe5
        • 2.Sc3#
      • 1...Se3
        • 2.f3#
      • 1...Se7
        • 2.Sd6#
      • 1...Rf7!
  • Keys
    • 1.Sc6!
      • threat
        • 2.Sc3#
      • 1...Kd5
        • 2.Sc3#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...dxe1Q
        • 2.Qxb1#
      • 1...dxe1B
        • 2.Qxb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(g);P_SPINS(k),SBLOCK,XB(J)::QAB(C),XB(a)
    • B(a);OGATE::R(B)+P(D)DCHECK,XB(a)
    • B(l);N_GUARD::S(I),XB(l)
    • B(l);N_GUARD::S(I)
    • S(b);SBLOCK::P(E)
    • S(k);P_SPINR(g),S_CUTB(l)::S(I)
    • P(e);OGATE::R(B)+P(D)DCHECK,XP(e)
    • P(f);N_GUARD,XS(H)::QAR1(C)
    • P(f);N_GUARD::QAR1(C)
  • Tries
    • Try
      • B(J);
      • Threat
        • QAB(C),XB(a)
      • Vars
        • B(l);XB(J)::S(I),XB(l)
        • P(c);XR(B)::S(I)
        • P(f);N_GUARD,XS(H)::QAR1(C)
        • B(a);N_GUARD::QAB(C)
        • B(a);N_GUARD::QAB(C),XB(a)
        • B(a);OGATE::R(B)+P(D)DCHECK,XB(a)
        • S(b);SBLOCK::P(E)
        • S(k);N_GUARD,P_SPINR(g)::QAR1(C),XS(k)
      • Refutation
        • R(g);P_SPINS(k)
    • Try
      • P(L);
      • Threat
        • QAB(L)
      • Vars
        • R(g);P_SPINS(k),SBLOCK,XB(J)::QAB(C),XB(a)
        • S(k);P_SPINR(g),SBLOCK,XB(J)::S(I)
        • S(b);SBLOCK::P(E)
        • S(k);P_SPINR(g),S_CUTB(l)::S(I)
      • Refutation
        • R(j);
  • Actual
    • S(H);
    • Threat
      • S(I)
    • Vars
      • K(d);P_SPINP(c),S_FLIGHT::S(I)
      • R(g);OGATE,P_SPINS(k),XB(J)::QAR1(C),XR(g)
      • P(c);XR(B)::QAB(C),XB(a)
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