MESON Chess Problem Database

Problem Display
PID: 74080 (Q2R4/1N2p3/4k3/1n3n2/B1P3N1/5R2/3K4/8 w - - 0 1)

Rahau, I

1/2 Prize, Revista de Sah, 1952

Q2R4/1N2p3/4k3/1n3n2/B1P3N1/5R2/3K4/8

#2

8 + 4

3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Se3
      • 2.Sc5#
      • 2.Qc8#
    • 1...Sg3
      • 2.Sc5#
      • 2.Qc8#
    • 1...Sd4
      • 2.Sc5#
      • 2.Qc8#
    • 1...Sh4
      • 2.Sc5#
      • 2.Qc8#
    • 1...Sd6
      • 2.Sc5#
    • 1...Sh6
      • 2.Sc5#
      • 2.Qc8#
    • 1...Sg7
      • 2.Sc5#
      • 2.Qc8#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Qe4#
        • 2.Qd5#
        • 2.Qc8#
      • 1...Sbxd6
        • 2.Qd5#
      • 1...Sfxd6
        • 2.Qd5#
      • 1...Sc3
        • 2.Qc8#
      • 1...Sa7
        • 2.Qe4#
        • 2.Qd5#
      • 1...Sc7
        • 2.Qe4#
        • 2.Qc8#
      • 1...Se3
        • 2.Rxe3#
        • 2.Qe4#
        • 2.Qc8#
      • 1...Sg3
        • 2.Qd5#
        • 2.Qc8#
      • 1...exd6!
    • 1.Bxb5?
      • 1...Se3
        • 2.Sc5#
        • 2.Bd7#
        • 2.Qa6#
        • 2.Qc8#
      • 1...Sg3
        • 2.Sc5#
        • 2.Bd7#
        • 2.Qa6#
        • 2.Qc8#
      • 1...Sd4
        • 2.Sc5#
        • 2.Bd7#
        • 2.Qc8#
      • 1...Sh4
        • 2.Sc5#
        • 2.Bd7#
        • 2.Qa6#
        • 2.Qc8#
      • 1...Sd6
        • 2.Sc5#
        • 2.Bd7#
      • 1...Sh6
        • 2.Sc5#
        • 2.Bd7#
        • 2.Qa6#
        • 2.Qc8#
      • 1...Sg7
        • 2.Sc5#
        • 2.Bd7#
        • 2.Qa6#
        • 2.Qc8#
      • 1...Kf7!
    • 1.Rxf5?
      • threat
        • 2.Qc8#
      • 1...Sd6
        • 2.Bd7#
      • 1...Sa7
        • 2.Bd7#
      • 1...Kxf5!
    • 1.Rdd3?
      • threat
        • 2.Sd8#
        • 2.Qg8#
      • 1...Sbd4
        • 2.Qg8#
      • 1...Sbd6
        • 2.Sd8#
      • 1...Sfd4
        • 2.Qc8#
      • 1...Sfd6
        • 2.Sc5#
      • 1...Sh6
        • 2.Sc5#
        • 2.Sd8#
        • 2.Qc8#
      • 1...Kf7!
    • 1.Rd4?
      • threat
        • 2.Sd8#
        • 2.Qg8#
      • 1...Sbxd4
        • 2.Qg8#
      • 1...Sfxd4
        • 2.Qc8#
      • 1...Sbd6
        • 2.Sd8#
      • 1...Sfd6
        • 2.Sc5#
      • 1...Sh6
        • 2.Sc5#
        • 2.Sd8#
        • 2.Qc8#
      • 1...Kf7!
    • 1.Rd5?
      • threat
        • 2.Sd8#
        • 2.Qg8#
      • 1...Sbd6
        • 2.Sd8#
      • 1...Sfd6
        • 2.Sc5#
      • 1...Sh6
        • 2.Sc5#
        • 2.Sd8#
        • 2.Qc8#
      • 1...Kf7!
    • 1.Rf8?
      • threat
        • 2.Qc8#
      • 1...Kd7
        • 2.Qc8#
      • 1...Sbd6
        • 2.Sc5#
        • 2.Sd8#
      • 1...Sfd6
        • 2.Sc5#
      • 1...Sa7!
    • 1.Qa5?
      • 1...Sa3
        • 2.Qd5#
        • 2.Qxf5#
      • 1...Sc3
        • 2.Qxf5#
      • 1...Sbd4
        • 2.Qd5#
      • 1...Sbd6
        • 2.Qd5#
      • 1...Sa7
        • 2.Qd5#
        • 2.Qxf5#
      • 1...Sc7
        • 2.Qxf5#
      • 1...Se3
        • 2.Sc5#
      • 1...Sg3
        • 2.Sc5#
      • 1...Sfd4
        • 2.Sc5#
      • 1...Sh4
        • 2.Sc5#
      • 1...Sfd6
        • 2.Sc5#
      • 1...Sh6
        • 2.Sc5#
      • 1...Sg7
        • 2.Sc5#
      • 1...Kf7!
    • 1.cxb5?
      • threat
        • 2.Bb3#
      • 1...Se3
        • 2.Sc5#
        • 2.Qa6#
        • 2.Qc8#
      • 1...Sd4
        • 2.Sc5#
        • 2.Qc8#
      • 1...Sd6
        • 2.Sc5#
      • 1...Kf7!
  • Keys
    • 1.Rh8!
      • 1...Kd7
        • 2.Qc8#
      • 1...Kf7
        • 2.Qg8#
      • 1...Sa3
        • 2.Qg8#
      • 1...Sc3
        • 2.Qg8#
      • 1...Sbd4
        • 2.Qg8#
      • 1...Sbd6
        • 2.Sd8#
      • 1...Sa7
        • 2.Qg8#
      • 1...Sc7
        • 2.Qg8#
      • 1...Se3
        • 2.Qc8#
      • 1...Sg3
        • 2.Qc8#
      • 1...Sfd4
        • 2.Qc8#
      • 1...Sh4
        • 2.Qc8#
      • 1...Sfd6
        • 2.Sc5#
      • 1...Sh6
        • 2.Qc8#
      • 1...Sg7
        • 2.Qc8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 14
    • REMOVED MATES = 0
  • Sets
    • S(b);::S(F)
  • Tries
    • Try
      • S(F);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);XS(F)::QAB1(G)
        • S(b);XS(F)::QAB1(G)
        • S(a);::QAB(G)
      • Refutation
        • P(d);XS(F)
    • Try
      • B(C);XS(a)
      • Refutation
        • K(c);P_SPINS(b),S_FLIGHT
    • Try
      • R(B);XS(b)
      • Threat
        • QAB(G)
      • Vars
        • S(a);OGATE::B(C)
      • Refutation
        • K(c);S_FLIGHT,XR(B)
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::QAB(G)
        • S(a);::S(F)
        • S(b);::QAB(G)
        • S(b);::S(F)
      • Refutation
        • K(c);P_SPINS(b),S_FLIGHT
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XR(H)::QAB(G)
        • S(b);XR(H)::QAB(G)
        • S(a);::S(F)
        • S(b);::S(F)
      • Refutation
        • K(c);P_SPINS(b),S_FLIGHT
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);::S(F)
        • S(b);::S(F)
      • Refutation
        • K(c);P_SPINS(b),S_FLIGHT
    • Try
      • R(H);
      • Threat
        • QAB(G)
      • Vars
        • K(c);P_SPINS(a),S_FLIGHT::QAB1(G)
        • S(b);SBLOCK::S(F)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Vars
        • S(a);OGATE::QAB1(G),XS(b)
        • S(a);OGATE::QAB1(G)
        • S(b);::S(F)
      • Refutation
        • K(c);P_SPINS(b),S_FLIGHT
    • Try
      • P(D);XS(a)
      • Threat
        • B(C)
      • Vars
        • S(b);::S(F)
      • Refutation
        • K(c);P_SPINS(b),S_FLIGHT
  • Actual
    • R(H);
    • Vars
      • K(c);P_SPINS(a),S_FLIGHT::QAB1(G)
      • K(c);P_SPINS(b),S_FLIGHT::QAB1(G)
      • S(a);::QAB(G)
      • S(a);SBLOCK::S(F)
      • S(b);::QAB(G)
      • S(b);SBLOCK::S(F)
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