MESON Chess Problem Database

Problem Display
PID: 17783 (2R4B/1N1B4/8/4p3/Npr5/1P1kq3/K1n2Q2/4R3 w - - 0 1)

Siaperas, Trandaphilos

1st Prize, Sah, 1949

2R4B/1N1B4/8/4p3/Npr5/1P1kq3/K1n2Q2/4R3

#2

9 + 6

3105 FIDE Album (1945-1955) 1964
5862 An ABC of Chess Problems 1970
4640 Chess Wizardry: The New ABC of Chess Problems 1996

SOLUTION

  • SOUND
  • Sets
    • 1...Qd4
      • 2.Qe2#
    • 1...Qe4
      • 2.Rd1#
    • 1...Rd4
      • 2.Sbc5#
      • 2.Qxc2#
    • 1...Sd4
      • 2.Rxe3#
    • 1...e4
      • 2.Sb2#
  • Tries
    • 1.Bf5+?
      • 1...Kd4
        • 2.Rd1#
        • 2.Rd8#
      • 1...Qe4
        • 2.Rd1#
      • 1...e4
        • 2.Sb2#
      • 1...Re4!
    • 1.Rd1+?
      • 1...Ke4
        • 2.Sd6#
        • 2.Bf5#
        • 2.Qf5#
      • 1...Qd2!
    • 1.Rxe3+?
      • 1...Kd4
        • 2.Qd2#
      • 1...Sxe3!
    • 1.Rxc4?
      • threat
        • 2.Sb2#
        • 2.Qxc2#
      • 1...Qxe1
        • 2.Sb2#
        • 2.Sac5#
        • 2.Sbc5#
      • 1...Sxe1
        • 2.Sb2#
      • 1...Qe2
        • 2.Qxe2#
      • 1...Sd4
        • 2.Sac5#
        • 2.Sbc5#
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Qc1
        • 2.Sac5#
        • 2.Sbc5#
        • 2.Qe2#
      • 1...Qd2
        • 2.Sb2#
        • 2.Sac5#
        • 2.Sbc5#
      • 1...Qd4
        • 2.Qxc2#
        • 2.Qe2#
      • 1...Qa7
        • 2.Rd1#
        • 2.Qxc2#
        • 2.Qe2#
      • 1...Sa1
        • 2.Sb2#
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Sa3
        • 2.Sb2#
        • 2.Rxe3#
        • 2.Qxe3#
      • 1...Qxf2!
  • Keys
    • 1.Rd8!
      • threat
        • 2.Bf5#
      • 1...Kd4
        • 2.Bf5#
        • 2.Bc6#
      • 1...Ke4
        • 2.Bf5#
      • 1...Qd4
        • 2.Qe2#
      • 1...Qe4
        • 2.Rd1#
      • 1...Rd4
        • 2.Sbc5#
      • 1...Re4
        • 2.Bb5#
      • 1...Sd4
        • 2.Rxe3#
      • 1...e4
        • 2.Sb2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • Q(c);N_GUARD,SBLOCK::QAB1(C)
    • Q(c);N_GUARD,SBLOCK::R(A)
    • S(a);N_GUARD,SBLOCK::R1(A),XQ(c)
    • P(f);SBLOCK::S(E)
  • Tries
    • Try
      • B(G);CHECK
      • Vars
        • Q(c);P_SPINQ(c)::R(A)
        • P(f);P_SPINP(f)::S(E)
      • Refutation
        • R(e);P_SPINR(e)
    • Try
      • R(A);CHECK
      • Refutation
        • Q(c);P_SPINQ(c)
    • Try
      • R(A);CHECK,XQ(c)
      • Vars
        • K(b);P-FLIGHT,P_SPINP(f)::QAR2(C)
      • Refutation
        • S(a);XR(A)
    • Try
      • R(H);XR(e)
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XR(A)::S(E)
        • Q(c);N_GUARD::QAB1(C),XQ(c)
      • Refutation
        • Q(c);XQ(C)
  • Actual
    • R(H);
    • Threat
      • R(H)+B(G),DCHECK
    • Vars
      • K(b);P_SPINQ(c),S_FLIGHT::B(G)
      • Q(c);N_GUARD,SBLOCK::QAB1(C)
      • Q(c);N_GUARD,SBLOCK::R(A)
      • R(e);N_GUARD,SBLOCK,S_CUTQ(c)::S(F)
      • R(e);SBLOCK::R(H)+B(G),DCHECK
      • S(a);N_GUARD,SBLOCK::R1(A),XQ(c)
      • P(f);SBLOCK::S(E)
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