MESON Chess Problem Database

Problem Display
PID: 21346 (bbn2q2/8/3Q4/NP1p4/RP1kPP2/2r2P2/PK1P2R1/BB2N3 w - - 0 1)

Weenink, Henri Gerard Maria

Good Companions (March), 1918

bbn2q2/8/3Q4/NP1p4/RP1kPP2/2r2P2/PK1P2R1/BB2N3

#2

15 + 7

3132 The Good Companion Two-Mover 1922

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Kxc1#
    • 1...Rc2+
      • 2.Kxc2#
    • 1...Ra3
      • 2.Kxa3#
    • 1...Rb3+
      • 2.Kxb3#
    • 1...Rd3
      • 2.Sc2#
    • 1...Rxf3
      • 2.Sxf3#
    • 1...Rc4
      • 2.Sb3#
    • 1...Rc5
      • 2.bxc5#
    • 1...Rc6
      • 2.Qxd5#
    • 1...Rc7
      • 2.Qe5#
    • 1...Ba7
      • 2.Qe5#
  • Tries
    • 1.Sc2+?
      • 1...Rxc2+
        • 2.Kxc2#
      • 1...Kd3!
    • 1.Sb3+?
      • 1...Rxb3+
        • 2.Kxb3#
      • 1...Kc4!
    • 1.Sc6+?
      • 1...Kc4
        • 2.Qxd5#
      • 1...Rxc6
        • 2.Qxd5#
      • 1...Bxc6!
    • 1.Qf6+?
      • 1...Be5
        • 2.Qxe5#
      • 1...Qxf6!
  • Keys
    • 1.Re2!
      • threat
        • 2.dxc3#
      • 1...Rc2+
        • 2.Kxc2#
      • 1...Rb3+
        • 2.Kxb3#
      • 1...Rxf3
        • 2.Sxf3#
      • 1...Rc1
        • 2.Kxc1#
      • 1...Ra3
        • 2.Kxa3#
      • 1...Rd3
        • 2.Sc2#
      • 1...Re3
        • 2.dxe3#
      • 1...Rc4
        • 2.Sb3#
      • 1...Rc5
        • 2.bxc5#
      • 1...Rc6
        • 2.Qxd5#
      • 1...Rc7
        • 2.Qe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(a);::B(A)+K(E),XR(a)
    • R(a);CHECK::B(A)+K(E),XR(a)
    • R(a);N_GUARD,SBLOCK::S(C)
    • R(a);XP(H)::S(C),XR(a)
    • R(a);N_GUARD,SBLOCK::S(M)
    • R(a);OGATE::R(I)+P(J),XR(a)
    • R(a);S_CUTB(d)::QAR1(O),XP(c)
    • R(a);S_CUTB(e)::QAB1(O)
    • B(e);N_GUARD::QAB1(O)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • R(a);CHECK,XS(C)::B(A)+K(E),XR(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(M);CHECK
      • Vars
        • R(a);CHECK,XS(M)::B(A)+K(E),XR(a)
      • Refutation
        • K(b);N_SPINP(c),P-FLIGHT
    • Try
      • S(M);CHECK
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAB1(O),XP(c)
        • R(a);XS(M)::QAR1(O),XP(c)
      • Refutation
        • B(d);XS(M)
    • Try
      • Q(O);CHECK,N_PINP(c)
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::QAB1(O),XB(e)
      • Refutation
        • Q(g);XQ(O)
  • Actual
    • R(G);
    • Threat
      • P(F),XR(a)
    • Vars
      • R(a);CHECK::B(A)+K(E),XR(a)
      • R(a);XP(H)::S(C),XR(a)
      • R(a);::B(A)+K(E),XR(a)
      • R(a);N_GUARD,SBLOCK::S(C)
      • R(a);OGATE::P(F),XR(a)
      • R(a);N_GUARD,SBLOCK::S(M)
      • R(a);OGATE::R(I)+P(J),XR(a)
      • R(a);S_CUTB(d)::QAR1(O),XP(c)
      • R(a);S_CUTB(e)::QAB1(O)
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