MESON Chess Problem Database

Problem Display
PID: 103160 (4nr1b/2pN4/B3Q3/3p2N1/3k1p1K/2pp1Rpp/3r3n/5b2 w - - 0 1)

Marienstrass, Z

Warszawa Probl., 1932

4nr1b/2pN4/B3Q3/3p2N1/3k1p1K/2pp1Rpp/3r3n/5b2

#2

6 + 14

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Re2
      • 2.Rxd3#
    • 1...Rf6
      • 2.Qe5#
    • 1...Rg8
      • 2.Rxf4#
    • 1...Be5
      • 2.Qxe5#
    • 1...Bf6
      • 2.Rxf4#
    • 1...Sxf3+
      • 2.Sxf3#
    • 1...Sf6
      • 2.Qe5#
    • 1...Sg7
      • 2.Qe5#
  • Tries
    • 1.Qb6+?
      • 1...c5
        • 2.Qxc5#
      • 1...cxb6!
    • 1.Qc6?
      • threat
        • 2.Qa4#
        • 2.Qc5#
      • 1...Ra2
        • 2.Qc5#
      • 1...Rb2
        • 2.Qc5#
      • 1...Sd6
        • 2.Qc5#
      • 1...c2
        • 2.Qc5#
      • 1...Sxf3+!
    • 1.Qe7?
      • threat
        • 2.Qb4#
        • 2.Qc5#
      • 1...Sxf3+
        • 2.Sxf3#
      • 1...Rb2
        • 2.Qc5#
      • 1...c5
        • 2.Qxc5#
      • 1...Sd6!
  • Keys
    • 1.Qe1!
      • threat
        • 2.Se6#
      • 1...Sxf3+
        • 2.Sxf3#
      • 1...c2
        • 2.Qa1#
      • 1...Re2
        • 2.Rxd3#
      • 1...Rf6
        • 2.Qe5#
      • 1...Be2
        • 2.Qg1#
      • 1...Bf6
        • 2.Rxf4#
      • 1...Sg7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • R(b);N_GUARD,S_CUTB(a)::R1(A),XP(e)
    • R(m);S_CUTB(n)::QAB1(E)
    • R(m);N_GUARD::R(A),XP(i)
    • B(n);N_GUARD::QAB1(E),XB(n)
    • B(n);P_PINS(C),S_CUTR(m)::R(A),XP(i)
    • S(c);CHECK,XR(A)::S(C),XS(c)
    • S(l);S_CUTB(n)::QAB1(E)
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • P(k);P_SPINP(k)::QAB1(E),XP(k)
      • Refutation
        • P(k);XQ(E)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);::QAB1(E)
        • S(l);::QAB1(E)
        • P(d);::QAB1(E)
      • Refutation
        • S(c);CHECK,XR(A)
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);CHECK,XR(A)::S(C),XS(c)
        • R(b);::QAB1(E)
        • P(k);::QAB1(E),XP(k)
      • Refutation
        • S(l);
  • Actual
    • Q(E);
    • Threat
      • S(C)
    • Vars
      • S(c);CHECK,XR(A)::S(C),XS(c)
      • P(d);OGATEB::QAB(E)
      • R(b);N_GUARD,S_CUTB(a)::R1(A),XP(e)
      • R(m);S_CUTB(n)::QAB1(E)
      • B(a);OGATE::QAB(E)
      • B(n);P_PINS(C),S_CUTR(m)::R(A),XP(i)
      • S(l);S_CUTB(n)::QAB1(E)
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