MESON Chess Problem Database

Problem Display
PID: 21095 (8/8/8/5p2/2p2K2/Qp2B3/1n1rPN2/RbkBN3 w - - 0 1)

Guidelli, Giorgio

Good Companions (May), 1916

8/8/8/5p2/2p2K2/Qp2B3/1n1rPN2/RbkBN3

#2

8 + 7

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Sed3#
  • Tries
    • 1.Kf3?
      • 1...c3
        • 2.Sed3#
      • 1...f4!
    • 1.Kg3?
      • 1...c3
        • 2.Sed3#
      • 1...f4+!
    • 1.Ke5?
      • 1...c3
        • 2.Sed3#
      • 1...f4!
    • 1.Kg5?
      • 1...c3
        • 2.Sed3#
      • 1...f4!
    • 1.Bxb3?
      • 1...c3
        • 2.Sed3#
        • 2.Sfd3#
      • 1...cxb3!
    • 1.Qb4?
      • threat
        • 2.Bxd2#
        • 2.Qxd2#
        • 2.Qc3#
      • 1...Sxd1
        • 2.Qxd2#
      • 1...Sa4
        • 2.Qxd2#
      • 1...c3
        • 2.Qxc3#
      • 1...Sd3+!
    • 1.Qa5?
      • threat
        • 2.Bxd2#
        • 2.Qxd2#
        • 2.Qc3#
      • 1...Sxd1
        • 2.Qxd2#
      • 1...Sa4
        • 2.Qxd2#
      • 1...c3
        • 2.Qxc3#
      • 1...Sd3+!
  • Keys
    • 1.Qc5!
      • 1...Sd3+
        • 2.Sexd3#
      • 1...Sxd1
        • 2.Sfd3#
      • 1...Sa4
        • 2.Sed3#
      • 1...c3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(f);N_GUARD::S(C)
  • Tries
    • Try
      • K(H);P-FLIGHT
      • Vars
        • P(f);N_GUARD::S(C)
      • Refutation
        • P(g);
    • Try
      • K(H);S_FLIGHT
      • Vars
        • P(f);N_GUARD::S(C)
      • Refutation
        • P(g);CHECK
    • Try
      • K(H);S_FLIGHT
      • Vars
        • P(f);N_GUARD::S(C)
      • Refutation
        • P(g);
    • Try
      • K(H);S_FLIGHT
      • Vars
        • P(f);N_GUARD::S(C)
      • Refutation
        • P(g);
    • Try
      • B(B);XP(e)
      • Refutation
        • P(f);XB(B)
    • Try
      • Q(F);N_PINS(c)
      • Threat
        • DUALS(3)
      • Vars
        • S(c);XB(B)::QAB1(F),XR(d)
        • S(c);::QAB1(F),XR(d)
        • P(f);::QAR2(F),XP(f)
      • Refutation
        • S(c);CHECK
    • Try
      • Q(F);N_PINS(c)
      • Threat
        • DUALS(3)
      • Vars
        • S(c);XB(B)::QAB1(F),XR(d)
        • S(c);::QAB1(F),XR(d)
        • P(f);::QAR2(F),XP(f)
      • Refutation
        • S(c);CHECK
  • Actual
    • Q(F);N_PINS(c),P_PINP(f)
    • Vars
      • S(c);CHECK,N_GUARD::S(C),XS(c)
      • S(c);N_GUARD,SBLOCK,XB(B)::S(E)
      • S(c);N_GUARD::S(C)
      • P(f);OGATE::QAR2(F),XP(f)
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