MESON Chess Problem Database

Problem Display
PID: 198871 (K2B1n2/p1N3p1/r1p2p2/2N1k3/1pP1B3/2p2qPb/4Q3/3R4 w - - 0 1)

Jerrard, Ernest Haslam Harvey

Brisbane Courier, 1921

K2B1n2/p1N3p1/r1p2p2/2N1k3/1pP1B3/2p2qPb/4Q3/3R4

#2

9 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe4
      • 2.Qxe4#
    • 1...Se6
      • 2.Sd7#
    • 1...f5
      • 2.Bxf3#
  • Tries
    • 1.S7xa6?
      • threat
        • 2.Bc7#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Se6
        • 2.Sd7#
      • 1...f5
        • 2.Bxf3#
      • 1...Qd3!
    • 1.S7e6?
      • threat
        • 2.Bc7#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Sxe6
        • 2.Sd7#
      • 1...f5
        • 2.Bxf3#
      • 1...Qd3!
    • 1.Se8?
      • threat
        • 2.Bc7#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Se6
        • 2.Sd7#
      • 1...Qd3!
    • 1.Bb1+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Qxe2!
    • 1.Bc2+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Qxe2!
    • 1.Bxc6+?
      • 1...Qxe2
        • 2.Rd5#
      • 1...Qe4
        • 2.Rd5#
        • 2.Qxe4#
      • 1...Qe3
        • 2.Rd5#
      • 1...Kf5!
    • 1.Bg6+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Qxe2!
    • 1.Bh7+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Qe3
        • 2.Qxe3#
      • 1...Qxe2!
    • 1.Be7?
      • threat
        • 2.Bd6#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...f5
        • 2.Bxf3#
      • 1...Qd3!
    • 1.Qxf3?
      • threat
        • 2.Qf4#
      • 1...Se6
        • 2.Sd7#
      • 1...g5
        • 2.Bxf6#
        • 2.Qxf6#
      • 1...Sg6!
  • Keys
    • 1.Sb5!
      • threat
        • 2.Bc7#
      • 1...Qxe4
        • 2.Qxe4#
      • 1...cxb5
        • 2.Rd5#
      • 1...Qd3
        • 2.Bxd3#
      • 1...Se6
        • 2.Sd7#
      • 1...f5
        • 2.Bxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(b);OGATE,P_SPINQ(b),XB(E)::QAR1(B),XQ(b)
    • S(k);N_GUARD,S_CUTB(c)::S(F)
    • P(h);SBLOCK::QAR(B)+B(E),XQ(b)
  • Tries
    • Try
      • S(G);XR(f)
      • Threat
        • B(I)
      • Vars
        • Q(b);OGATE,P_SPINQ(b),XB(E)::QAR1(B),XQ(b)
        • S(k);N_GUARD,SBLOCK,S_CUTB(c)::S(F)
        • P(h);SBLOCK::QAR(B)+B(E),XQ(b)
      • Refutation
        • Q(b);
    • Try
      • S(G);
      • Threat
        • B(I)
      • Vars
        • Q(b);OGATE,P_SPINQ(b),XB(E)::QAR1(B),XQ(b)
        • S(k);N_GUARD,SBLOCK,XS(G)::S(F)
        • P(h);SBLOCK::QAR(B)+B(E),XQ(b)
      • Refutation
        • Q(b);
    • Try
      • S(G);
      • Threat
        • B(I)
      • Vars
        • Q(b);OGATE,P_SPINQ(b),XB(E)::QAR1(B),XQ(b)
        • S(k);N_GUARD,SBLOCK,S_CUTB(c)::S(F)
      • Refutation
        • Q(b);
    • Try
      • B(E);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR1(B),XQ(b)
        • Q(b);N_GUARD,P_SPINQ(b)::QAR2(B),XQ(b)
      • Refutation
        • Q(b);XQ(B)
    • Try
      • B(E);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR1(B),XQ(b)
        • Q(b);N_GUARD,P_SPINQ(b)::QAR2(B),XQ(b)
      • Refutation
        • Q(b);XQ(B)
    • Try
      • B(E);CHECK,P_SPINB(E),XP(g)
      • Vars
        • Q(b);N_PINB(E),XQ(B)::R1(A)
        • Q(b);N_PINB(E),P_SPINQ(b)::R1(A)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • B(E);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR1(B),XQ(b)
        • Q(b);N_GUARD,P_SPINQ(b)::QAR2(B),XQ(b)
      • Refutation
        • Q(b);XQ(B)
    • Try
      • B(E);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::QAR1(B),XQ(b)
        • Q(b);N_GUARD,P_SPINQ(b)::QAR2(B),XQ(b)
      • Refutation
        • Q(b);XQ(B)
    • Try
      • B(I);
      • Threat
        • B(I)
      • Vars
        • Q(b);OGATE,P_SPINQ(b),XB(E)::QAR1(B),XQ(b)
        • P(h);SBLOCK::QAR(B)+B(E),XQ(b)
      • Refutation
        • Q(b);
    • Try
      • Q(B);XQ(b)
      • Threat
        • QAB1(B)
      • Vars
        • S(k);N_GUARD,S_CUTB(c)::S(F)
      • Refutation
        • S(k);
  • Actual
    • S(G);
    • Threat
      • B(I)
    • Vars
      • Q(b);OGATE,P_SPINQ(b),XB(E)::QAR1(B),XQ(b)
      • P(g);N_GUARD,P_PINB(E),XS(G)::R1(A)
      • Q(b);N_GUARD::QAR(B)+B(E),XQ(b)
      • S(k);N_GUARD,SBLOCK,S_CUTB(c)::S(F)
      • P(h);SBLOCK::QAR(B)+B(E),XQ(b)
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