MESON Chess Problem Database

Problem Display
PID: 182443 (2bR4/1p5p/r2b3Q/2p1kp2/1p3R2/2np4/5P1K/B6B w - - 0 1)

Papadrossos, A

Bulletin Ouvrier des Echecs, 1953

2bR4/1p5p/r2b3Q/2p1kp2/1p3R2/2np4/5P1K/B6B

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa1
      • 2.Qxd6#
    • 1...Ra2
      • 2.Qxd6#
    • 1...Ra3
      • 2.Qxd6#
    • 1...Ra4
      • 2.Qxd6#
    • 1...Ra5
      • 2.Qxd6#
    • 1...Ra7
      • 2.Qxd6#
    • 1...Ra8
      • 2.Qxd6#
    • 1...Bc7
      • 2.Rd5#
    • 1...Be7
      • 2.Rd5#
    • 1...Bb8
      • 2.Rd5#
    • 1...Bf8
      • 2.Rd5#
    • 1...b3
      • 2.Bxc3#
    • 1...b6
      • 2.Qxd6#
  • Tries
    • 1.Rc4?
      • threat
        • 2.f4#
      • 1...Ra2
        • 2.Qxd6#
      • 1...f4!
    • 1.Re8+?
      • 1...Be6
        • 2.Rxe6#
      • 1...Be7!
    • 1.Qg7+?
      • 1...Kxf4
        • 2.Qg3#
      • 1...Ke6!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Rd5#
      • 1...Kxd4+
        • 2.Qf4#
      • 1...Rxa1
        • 2.Qxd6#
      • 1...cxd4
        • 2.f4#
      • 1...Be6
        • 2.Qg7#
      • 1...Se4
        • 2.f4#
      • 1...Sd5
        • 2.Re4#
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 12
  • Sets
    • R(g);N_GUARD,N_SPINS(a),XB(A)::QAB1(F),XB(h)
    • R(g);N_GUARD,P_PINP(C)::QAB1(F),XB(h)
    • R(g);N_GUARD::QAB1(F),XB(h)
    • B(h);OGATE::R1(G)
    • P(c);N_GUARD::B(A),XS(a)
    • P(i);S_CUTR(g)::QAB1(F),XB(h)
  • Tries
    • Try
      • R(E);
      • Threat
        • P(C)
      • Vars
        • R(g);N_GUARD,P_PINP(C)::QAB1(F),XB(h)
      • Refutation
        • P(f);
    • Try
      • R(G);CHECK
      • Vars
        • B(k);N_GUARD,P_SPINB(k)::R1(G),XB(k)
      • Refutation
        • B(h);P_SPINB(h)
    • Try
      • Q(F);CHECK
      • Vars
        • K(e);N_SPINS(a),OGATEB,S_FLIGHT,XR(E)::QAB1(F)
      • Refutation
        • K(e);N_SPINS(a),P-FLIGHT,P_PINR(E)
  • Actual
    • R(E);N_PINS(a)
    • Threat
      • R1(E)
    • Vars
      • K(e);CHECK,P_SPINB(h),P_SPINS(a),S_FLIGHT,XR(E)::QAR2(F)
      • R(g);N_GUARD,XB(A)::QAB1(F),XB(h)
      • P(d);SBLOCK,XR(E)::P(C)
      • B(k);SBLOCK::QAB(F)
      • S(a);::P(C)
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