MESON Chess Problem Database

Problem Display
PID: 40287 (b2B4/8/3b4/r5r1/p2p2p1/5pN1/3k4/nQRN1K2 w - - 0 1)

Perkins, Henry (Harry)

Manchester Times, 1921

b2B4/8/3b4/r5r1/p2p2p1/5pN1/3k4/nQRN1K2

#2

6 + 10

3360 Simple Two-move Themes 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Rad5
      • 2.Se4#
    • 1...Rgd5
      • 2.Se4#
    • 1...Bc5
      • 2.Bxg5#
    • 1...Be5
      • 2.Bxa5#
    • 1...Be4
      • 2.Sxe4#
    • 1...Sc2
      • 2.Qxc2#
    • 1...Sb3
      • 2.Qc2#
  • Tries
    • 1.Kf2?
      • threat
        • 2.Sf1#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Bxg3+!
    • 1.Bxa5+?
      • 1...Bb4
        • 2.Bxb4#
      • 1...Rxa5!
    • 1.Bxg5+?
      • 1...Bf4
        • 2.Bxf4#
      • 1...Rxg5!
    • 1.Rc3?
      • threat
        • 2.Rd3#
        • 2.Qd3#
        • 2.Qc1#
      • 1...Ba3
        • 2.Rd3#
        • 2.Qd3#
      • 1...Be4
        • 2.Sxe4#
        • 2.Qc1#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Sb3
        • 2.Rd3#
        • 2.Qc2#
        • 2.Qd3#
      • 1...d3
        • 2.Rxd3#
        • 2.Qxd3#
        • 2.Qc1#
      • 1...dxc3!
    • 1.Qb2+?
      • 1...Sc2
        • 2.Qxc2#
      • 1...Kd3!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Rxd4#
      • 1...Sc2
        • 2.Qxc2#
      • 1...Rad5
        • 2.Se4#
      • 1...Rgd5
        • 2.Se4#
      • 1...Bc5
        • 2.Bxg5#
      • 1...Be5
        • 2.Bxa5#
      • 1...Be4
        • 2.Sxe4#
      • 1...Sb3
        • 2.Qc2#
      • 1...d3
        • 2.Qc1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(g);S_CUTB(j)::S(E)
    • R(h);S_CUTB(j)::S(E)
    • B(i);N_GUARD,S_CUTR(g)::B(F),XR(h)
    • B(i);N_GUARD,S_CUTR(h)::B(F),XR(g)
    • B(j);N_GUARD::S(E),XB(j)
    • S(a);N_GUARD::QAR1(A),XS(a)
    • S(a);N_GUARD::QAR1(A)
  • Tries
    • Try
      • K(D);P-FLIGHT
      • Threat
        • S(E)
      • Vars
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • B(i);CHECK,XS(E)
    • Try
      • B(F);CHECK,XR(g)
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::B(F),XB(i)
      • Refutation
        • R(h);XB(F)
    • Try
      • B(F);CHECK,XR(h)
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::B(F),XB(i)
      • Refutation
        • R(g);XB(F)
    • Try
      • R(B);
      • Threat
        • DUALS(3)
      • Vars
        • S(a);N_GUARD::QAR1(A),XS(a)
      • Refutation
        • P(e);XR(B)
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(B);
    • Threat
      • R(B),XP(e)
    • Vars
      • S(a);N_GUARD::QAR1(A),XS(a)
      • R(g);S_CUTB(j)::S(E)
      • R(h);S_CUTB(j)::S(E)
      • B(i);N_GUARD,S_CUTR(g)::B(F),XR(h)
      • B(i);N_GUARD,S_CUTR(h)::B(F),XR(g)
      • B(j);N_GUARD::S(E),XB(j)
      • S(a);N_GUARD::QAR1(A)
      • P(e);SBLOCK::QAB1(A)
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