MESON Chess Problem Database

Problem Display
PID: 21501 (3QR3/r1p5/p7/r2B2K1/8/N7/1B1k4/7R w - - 0 1)

Guidelli, Giorgio

1st Prize, Good Companions (February), 1919

3QR3/r1p5/p7/r2B2K1/8/N7/1B1k4/7R

#2

7 + 5

3132 The Good Companion Two-Mover 1922
3360 Simple Two-move Themes 1924
45 Schach 1951
102 Probleemblad 1975
3310 2345 Chess Problems 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Rd1#
    • 1...Rxa3
      • 2.Bb3#
    • 1...Ra4
      • 2.Bc4#
    • 1...Rxd5+
      • 2.Qxd5#
    • 1...c5
      • 2.Bb7#
  • Tries
    • 1.Bc3+?
      • 1...Kd3
        • 2.Rh3#
      • 1...Kxc3!
    • 1.Qe7?
      • threat
        • 2.Qe2#
        • 2.Qe3#
      • 1...Kd3
        • 2.Rd1#
        • 2.Qe2#
        • 2.Qe3#
      • 1...Rxa3
        • 2.Qe2#
      • 1...Rxd5+!
  • Keys
    • 1.Rh4!
      • threat
        • 2.Rd4#
      • 1...Rxd5+
        • 2.Qxd5#
      • 1...Kd1
        • 2.Rd4#
      • 1...Kd3
        • 2.Rd4#
      • 1...Rxa3
        • 2.Bb3#
      • 1...Ra4
        • 2.Bc4#
      • 1...c5
        • 2.Bb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::R(A)
    • R(b);N_PINB(D),XS(C)::QAR(F)+B(D)
    • R(b);N_PINB(D)::QAR(F)+B(D)
    • R(b);CHECK,OGATE,P_SPINR(b),XB(D)::QAR(F),XR(b)
    • P(e);N_PINB(D)::QAR(F)+B(D)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(a);P-FLIGHT::R(A)
      • Refutation
        • K(a);S_FLIGHT,XB(B)
    • Try
      • Q(F);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);N_PINB(D),XS(C)::QAR1(F)
      • Refutation
        • R(b);CHECK,XB(D)
  • Actual
    • R(A);
    • Threat
      • R(A)
    • Vars
      • R(b);CHECK,OGATE,P_SPINR(b),XB(D)::QAR(F),XR(b)
      • K(a);P-FLIGHT::R(A)
      • K(a);P-FLIGHT::R1(A)
      • R(b);N_PINB(D),XS(C)::QAR(F)+B(D)
      • R(b);N_PINB(D)::QAR(F)+B(D)
      • P(e);N_PINB(D)::QAR(F)+B(D)
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