MESON Chess Problem Database

Problem Display
PID: 266712 (2RN2rb/K3Q2b/1p1P4/6p1/2Pk2P1/1R3P2/1Pprp3/1n2Nn2 w - - 0 1)

Witt, Andreas

Zadachi i Etyudi, 2011

2RN2rb/K3Q2b/1p1P4/6p1/2Pk2P1/1R3P2/1Pprp3/1n2Nn2

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd3
      • 2.Sxc2#
    • 1...Rg6
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
    • 1...Be5
      • 2.Se6#
    • 1...Bf6
      • 2.Qxf6#
    • 1...Sc3
      • 2.bxc3#
    • 1...Sh2
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sg3
      • 2.Qe3#
  • Tries
    • 1.Rd3+?
      • 1...Rxd3
        • 2.Sxc2#
      • 1...Bxd3!
    • 1.Rb5?
      • threat
        • 2.Rd5#
      • 1...Be4
        • 2.Qxe4#
      • 1...Be5
        • 2.Qxe5#
      • 1...Se3
        • 2.Se6#
      • 1...Sc3!
    • 1.Qe5+?
      • 1...Bxe5
        • 2.Se6#
      • 1...Kxe5!
    • 1.d7?
      • threat
        • 2.Qd6#
      • 1...Rd3
        • 2.Sxc2#
      • 1...Rg6
        • 2.Qe4#
      • 1...Be4
        • 2.Qxe4#
      • 1...Be5
        • 2.Se6#
      • 1...Sc3
        • 2.bxc3#
      • 1...Se3
        • 2.Qxe3#
      • 1...Bd3!
  • Keys
    • 1.f4!
      • threat
        • 2.Sf3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Rd3
        • 2.Sxc2#
      • 1...Be4
        • 2.Se6#
      • 1...Sc3
        • 2.bxc3#
      • 1...Sh2
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(d);N_GUARD,S_CUTB(i)::S(A),XP(c)
    • R(j);S_CUTB(i)::QAR1(I)
    • B(i);N_GUARD::QAR1(I),XB(i)
    • B(k);SBLOCK::S(K)
    • B(k);N_GUARD::QAB(I),XB(k)
    • S(a);OGATE::P(B),XS(a)
    • S(b);N_GUARD::QAB1(I)
    • S(b);N_GUARD::QAB1(I),XS(b)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • R(d);SBLOCK,XR(C)::S(A),XP(c)
      • Refutation
        • B(i);XR(C)
    • Try
      • R(C);
      • Threat
        • R1(C)
      • Vars
        • B(i);N_GUARD::QAR1(I),XB(i)
        • B(k);N_GUARD::QAB1(I),XB(k)
        • S(b);SBLOCK::S(K)
      • Refutation
        • S(a);
    • Try
      • Q(I);CHECK
      • Vars
        • B(k);SBLOCK,XQ(I)::S(K)
      • Refutation
        • K(f);S_FLIGHT,XQ(I)
    • Try
      • P(G);
      • Threat
        • QAR2(I)
      • Vars
        • R(d);N_GUARD,S_CUTB(i)::S(A),XP(c)
        • R(j);S_CUTB(i)::QAR1(I)
        • B(i);N_GUARD::QAR1(I),XB(i)
        • B(k);SBLOCK::S(K)
        • S(a);OGATE::P(B),XS(a)
        • S(b);N_GUARD::QAB1(I),XS(b)
      • Refutation
        • B(i);
  • Actual
    • P(D);
    • Threat
      • S(A)
    • Vars
      • B(k);N_GUARD::QAB1(I),XB(k)
      • R(d);N_GUARD,S_CUTB(i)::S(A),XP(c)
      • B(i);SBLOCK::S(K)
      • S(a);OGATE::P(B),XS(a)
      • S(b);N_GUARD::QAB1(I)
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