MESON Chess Problem Database

Problem Display
PID: 108089 (n7/1Rp5/kbB5/2P5/8/1K1P2P1/7Q/8 w - - 0 1)

Frak, Marian

Solarczyk-90 JT, 1999

n7/1Rp5/kbB5/2P5/8/1K1P2P1/7Q/8

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Qa2#
    • 1...Ba7
      • 2.Qa2#
  • Tries
    • 1.Rxb6+?
      • 1...Ka5
        • 2.Qa2#
        • 2.Qd2#
      • 1...Ka7
        • 2.Qa2#
      • 1...cxb6
        • 2.Qa2#
      • 1...Sxb6!
    • 1.Ra7+?
      • 1...Bxa7
        • 2.Qa2#
      • 1...Kxa7!
    • 1.Rb8?
      • 1...Ka5
        • 2.Qa2#
      • 1...Ka7
        • 2.Rxa8#
      • 1...Ba5
        • 2.Rxa8#
      • 1...Ba7
        • 2.Qa2#
      • 1...Bxc5!
    • 1.Qh1?
      • 1...Ka5
        • 2.Qa1#
      • 1...Ba5
        • 2.Bb5#
      • 1...Ba7
        • 2.Qa1#
      • 1...Bxc5!
    • 1.Qc2?
      • 1...Ka5
        • 2.Qa2#
      • 1...Ba5
        • 2.Qc4#
      • 1...Ba7
        • 2.Qa2#
      • 1...Bxc5!
    • 1.Qe2?
      • 1...Ka5
        • 2.Qa2#
      • 1...Ba5
        • 2.d4#
      • 1...Ba7
        • 2.Qa2#
      • 1...Bxc5!
    • 1.Qg2?
      • 1...Ka5
        • 2.Qa2#
      • 1...Ba5
        • 2.Bb5#
      • 1...Ba7
        • 2.Qa2#
      • 1...Bxc5!
    • 1.Qh8?
      • 1...Ka5
        • 2.Qa1#
      • 1...Ba5
        • 2.Qxa8#
      • 1...Ba7
        • 2.Qa1#
      • 1...Bxc5!
    • 1.d4?
      • 1...Ka5
        • 2.Qa2#
      • 1...Ba5
        • 2.Qe2#
      • 1...Ba7
        • 2.Qa2#
      • 1...Bxc5!
    • 1.cxb6?
      • threat
        • 2.Qa2#
      • 1...Ka5
        • 2.Qa2#
      • 1...Sxb6!
  • Keys
    • 1.Qh4!
      • 1...Ka5
        • 2.Qa4#
      • 1...Bxc5
        • 2.Qa4#
      • 1...Ba5
        • 2.Qc4#
      • 1...Ba7
        • 2.Qa4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);P-FLIGHT::QAR(A)
    • B(b);N_GUARD::QAR(A)
  • Tries
    • Try
      • R(G);CHECK,XB(b)
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • P(c);XR(G)::QAR(A)
      • Refutation
        • S(d);XR(G)
    • Try
      • R(G);CHECK
      • Vars
        • B(b);SBLOCK,XR(G)::QAR(A)
      • Refutation
        • K(a);P-FLIGHT,XR(G)
    • Try
      • R(G);
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • K(a);P-FLIGHT::R1(G),XS(d)
        • B(b);N_GUARD,SBLOCK::R(G),XS(d)
        • B(b);N_GUARD,SBLOCK::QAR(A)
      • Refutation
        • B(b);XP(E)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • B(b);SBLOCK::B(F)
        • B(b);N_GUARD::QAR(A)
      • Refutation
        • B(b);XP(E)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • B(b);SBLOCK::QAB(A)
        • B(b);N_GUARD::QAR(A)
      • Refutation
        • B(b);XP(E)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • B(b);SBLOCK::QAB(A)+P(C)
        • B(b);N_GUARD::QAR(A)
      • Refutation
        • B(b);XP(E)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • B(b);SBLOCK::B(F)
        • B(b);N_GUARD::QAR(A)
      • Refutation
        • B(b);XP(E)
    • Try
      • Q(A);
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • B(b);N_GUARD,SBLOCK::QAR2(A),XS(d)
        • B(b);N_GUARD::QAR(A)
      • Refutation
        • B(b);XP(E)
    • Try
      • P(C);
      • Vars
        • K(a);P-FLIGHT::QAR(A)
        • B(b);SBLOCK::QAB(A)
        • B(b);N_GUARD::QAR(A)
      • Refutation
        • B(b);XP(E)
    • Try
      • P(E);XB(b)
      • Threat
        • QAR(A)
      • Vars
        • K(a);P-FLIGHT::QAR(A)
      • Refutation
        • S(d);XP(E)
  • Actual
    • Q(A);
    • Vars
      • K(a);P-FLIGHT::QAR1(A)
      • B(b);N_GUARD,XP(E)::QAR2(A)
      • B(b);SBLOCK::QAB(A)
      • B(b);N_GUARD::QAR2(A)
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