MESON Chess Problem Database

Problem Display
PID: 185836 (5B2/rr1P4/nRN5/3k1pN1/3b4/1q3R1K/Q7/n4B2 w - - 0 1)

Henry, S

Chess, 1957

5B2/rr1P4/nRN5/3k1pN1/3b4/1q3R1K/Q7/n4B2

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qc4
      • 2.Bxc4#
      • 2.Qxc4#
    • 1...Be3
      • 2.Rxf5#
    • 1...Sc2
      • 2.Qxb3#
    • 1...Sc7
      • 2.d8Q#
      • 2.d8R#
  • Tries
    • 1.Sb4+?
      • 1...Ke5
        • 2.Bg7#
      • 1...Sxb4!
    • 1.Se7+?
      • 1...Ke5
        • 2.Bg7#
      • 1...Kc5!
    • 1.Rfxb3?
      • threat
        • 2.R3b5#
        • 2.Qg2#
      • 1...Rxb6
        • 2.Qg2#
      • 1...Bxb6
        • 2.Qg2#
      • 1...Sxb3
        • 2.Qxb3#
        • 2.Qg2#
      • 1...Bb2
        • 2.Rd3#
        • 2.R3b5#
      • 1...Bf2
        • 2.Rd3#
        • 2.R3b5#
      • 1...Bc5
        • 2.Rd3#
        • 2.Qg2#
      • 1...Sc2
        • 2.Rb1#
        • 2.Rb2#
        • 2.Ra3#
        • 2.Rc3#
        • 2.Rd3#
        • 2.Re3#
        • 2.Rf3#
        • 2.Rg3#
        • 2.R3b4#
        • 2.R3b5#
      • 1...Sb4
        • 2.Qg2#
      • 1...f4
        • 2.R3b5#
      • 1...Sc5!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Qe6#
      • 1...Qxf3+
        • 2.Qxf3#
      • 1...Sc5
        • 2.Se7#
      • 1...Qe3
        • 2.Qc4#
      • 1...Be3
        • 2.Rxf5#
      • 1...Be5
        • 2.Qxe5#
      • 1...Sc7
        • 2.d8Q#
        • 2.d8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • B(c);N_PINR(C)::R(C),XP(e)
    • S(a);N_GUARD::QAB(B),XQ(b)
    • S(f);S_CUTR(h)::P=Q
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(d);N_SPINQ(b),P-FLIGHT::B(I)
      • Refutation
        • S(f);XS(G)
    • Try
      • S(G);CHECK
      • Vars
        • K(d);N_SPINQ(b),P-FLIGHT::B(I)
      • Refutation
        • K(d);N_SPINQ(b),P-FLIGHT
    • Try
      • R(C);N_SPINR(C),XQ(b)
      • Threat
        • DUALS(2)
      • Vars
        • R(h);XR(F)::QAB(B)
        • B(c);XR(F)::QAB(B)
        • S(f);::QAB(B)
        • P(e);::QAB(B)+R(C),DCHECK
      • Refutation
        • S(f);
  • Actual
    • Q(B);N_PINQ(b)
    • Threat
      • QAB1(B)
    • Vars
      • Q(b);CHECK,OGATE,XR(C)::QAB(B),XQ(b)
      • S(f);SBLOCK::S(G)
      • Q(b);N_GUARD::QAB1(B)
      • B(c);N_PINR(C)::R(C),XP(e)
      • B(c);N_GUARD::QAR1(B),XB(c)
      • S(f);S_CUTR(h)::P=Q
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